Multiply: (4x – 7)(2x – 9)
2 answers:
<span><span>(<span><span>4x</span>−7</span>)</span><span>(<span><span>2x</span>−9)
</span></span></span><span>=<span><span>(<span><span>4x</span>+<span>−7</span></span>)</span><span>(<span><span>2x</span>+<span>−9</span></span>)
</span></span></span><span>=<span><span><span><span><span>(<span>4x</span>)</span><span>(<span>2x</span>)</span></span>+<span><span>(<span>4x</span>)</span><span>(<span>−9</span>)</span></span></span>+<span><span>(<span>−7</span>)</span><span>(<span>2x</span>)</span></span></span>+<span><span>(<span>−7</span>)</span><span>(<span>−9</span>)
</span></span></span></span><span>=<span><span><span><span>8<span>x2</span></span>−<span>36x</span></span>−<span>14x</span></span>+63
</span></span><span>=<span><span><span>8<span>x2</span></span>−<span>50x</span></span>+<span>63</span></span></span>
Hello there!
Let's use foil.
First: 4x * 2x = 8x^2
Outside: 4x * -9 = -36x
Inside: -7 * 2x = -14x
Last: -7 * -9 = 63
Now, let's combine these.
8x^2 - 36x - 14x + 63
Finally, we can simplify this
8x - 50x + 63
I hope I helped!
Let me know if you need anything else!
~ Zoe
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