Question

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

Answer 1

Step-by-step explanation:

Given that:

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

To find: Simplification of expression

Solution:

For simplification of expression,for y=-3

put the value of y in expression

$3y(2y - 7) - 3(y - 4) \\ \\ = 3( -3 )(2 \times ( - 3) - 7) - 3( - 3 - 4) \\ \\ = - 9( - 6 - 7) - 3( - 7) \\ \\ = - 9( - 13) + 21 \\ \\ = 117 + 21 \\ \\ = 138$