Question

. 2. Simplify the expression: 3z(3z-4)-5z 3. Simplify the expression 5y(2y-7)-45 and find the value of the expression for y=-1.

Answer 1

Step-by-step explanation:

3z(3z-4)-5z*3

9z^2-12z-15z

9z^2-27z

5y(2y-7)-45 (y=-1)(given)

10y^2-35y-45

put y=-1

=10*(-1)^2-35*(-1)-45

=10+35-45

=0 is your answer

Answer 2

Answer:

1. 3z(3z-4) -5z 3

8z - 12 z -5z 3 ( 3 is the power of 5z is it )

-4z - 15 z

- 19 z

2.. 5y (2y-7) -45 (y -- -1 )

10 2y - 35 y - 45

-20 y -35 y-45

- 55y - 45 is your answer ...

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