3 years ago

(ab - 9)(ab + 8) Please answer.

1 answer:

3 0

$\text{Use FOIL method:}\ (a+b)(c+d)=ac+ad+bc+bd\\\\(ab-9)(ab+8)=(ab)(ab)+(ab)(8)+(-9)(ab)+(-9)(8)\\\\=a^2b^2+8ab-9ab-72\\\\=\boxed{a^2b^2-ab-72}$

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ehidna [41]

Answer:

Step-by-step explanation:

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Read 2 more answers

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m_a_m_a [10]

We know that

The square root property is one method that is used to find the solutions to a quadratic equation. This method involves taking the square roots of both sides of the equation.
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Because exist the possibility of two roots for every square root, one positive and one negative

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