Question

Expand and simplify each of the following
expressions.
(a) 4(x + 3)2 - 3(x + 4)(x - 4)
​

Answer 1

Answer:

We have 4(X+3)2-3(X+4)(X-4)

8(X+3)-3(X+4)(X-4)

By using the identity 4:(a+b)(a-b)=a^2-b^2

Thus we have 8(X+3)-3(X^2-4^2)

>8(X+3)-3(X^2-16)

>8X+24-3X^2-48

3X²+8X-24