The answer is 19.. substitute -1 into the function whenever you see x put -1 there. This implies that 3+16 =19
Distribute each term in one parenthesis to the other terms in the other parenthesis.
(x - 2) (2x + 3)
First, distribute x. When distributing, multiply
x(2x) = 2x²
x(3) = 3x
Next, distribute the other term, -2. Remember to change the signs.
-2(2x) = -4x
-2(3) = -6
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2x² + 3x - 4x - 6
Combine like terms
3x - 4x = -x
2x² - x - 6
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2x² - x - 6 is your answer
hope this helps
