Question

M = 3p² - 12
a) Work out the value of M when p = -4

Answer 1

M = 36

Explanation:

M = 3p² - 12

Given that,

p = -4

To find the value of M replace p with -4 and solve the expression.

Let us solve it now.

M = 3p² - 12

M = 3 × ( - 4 )² - 12

M = 3 × 16 - 12

M = 36

Answer 2

• M = 36

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Substitute -4 for p and calculate:

• M = 3p² - 12
• M = 3(- 4)² - 12
• M = 3(16) - 12
• M = 48 - 12
• M = 36