15. Q15b
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Similar Question 1
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p> <code class='latex inline'>31\times29</code></p>
Similar Question 2
<p>Explain how to adapt the method in Question 14 to <code class='latex inline'>32\times28</code>. Then use your method to multiply each product.</p><p><code class='latex inline'>104\times96</code></p>
Similar Question 3
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p><code class='latex inline'>59\times61</code></p>
Similar Questions
Learning Path
L1 Quick Intro to Factoring Trinomial with Leading a
L2 Introduction to Factoring ax^2+bx+c
L3 Factoring ax^2+bx+c, ex1
Now You Try
<p>Explain how to adapt the method in Question 14 to <code class='latex inline'>32\times28</code>. Then use your method to multiply each product.</p><p><code class='latex inline'>35\times25</code></p>
<p>Explain how to adapt the method in Question 14 to <code class='latex inline'>32\times28</code>. Then use your method to multiply each product.</p><p><code class='latex inline'>76\times84</code></p>
<p>Explain how to adapt the method in Question 14 to <code class='latex inline'>32\times28</code>. Then use your method to multiply each product.</p><p><code class='latex inline'>104\times96</code></p>
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p><code class='latex inline'>99\times101</code></p>
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p><code class='latex inline'>59\times61</code></p>
<p>Explain how to adapt the method in Question 14 to <code class='latex inline'>32\times28</code>. Then use your method to multiply each product.</p><p><code class='latex inline'>77\times83</code></p>
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p> <code class='latex inline'>31\times29</code></p>
<p>An interesting way to multiply 19<code class='latex inline'>\times</code>21 is </p><p><code class='latex inline'>(20-1)(20+1)=20^2-1=400-1=399</code></p><p>Use this method to calculate each product.</p><p><code class='latex inline'>71\times69</code></p>
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