Question

3y (2y-7) - 3 (y-4) for y = 1

Answer 1

-6

Explanation:

Given that,

y = 1

To find the value of the given expression, replace y with 1.

`\rightarrow3y(2y - 7) - 3(y - 4) \\`

`\rightarrow3 * 1(2 * 1 - 7) - 3(1 - 4)`

`\rightarrow3(2 - 7) - 3( - 3)`

`\rightarrow3 * - 5 + 9 \\ \rightarrow - 15 + 9 \: \: \: \: \: \: \\ \rightarrow - 6 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:`

Answer 2

-6

Explanation:

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

Evaluate

Let y=1

3(1) ( 2*1 -7) -3( 1-4)

Parentheses first

3(2-7) -3(-3)

3(-5) -3(-3)

Multiply

-15 +9

-6