Question

Simplify the expression 3y(2y-7)-3(y-4) for y = -3

Answer 1

Answer:

p(y) = 3y(2y-7)-3(y-4)

p(-3) = 3(-3)[2(-3)-7]-3(-3-4)

       = -9[-6 - 7]-3(-7)

       = -9[-13]+21

       = 117 + 21

       = 138‬

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Answer 2

Answer:

⇢ p (y) = 3y (2y - 7) -3 (y - 4)

⇢ p (-3) = 3 {-3) {2 (-3) -7} -3 (-3 - 4)

⇢ -9 (-6 - 7) -3 (-7)

⇢ -9 (-13) +21

⇢ 117 + 21

⇢ 138‬