1 answer:
Answer:
4x^2 + 28x
Step-by-step explanation:
You use the distributive property and can say that it is equal to 4x * x + 4x * 7, which is equal to 4x^2 + 28x.
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X^2=4x+12
x^2-4x-12=0
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The correct answer is 43.75