Question

For x= -2 find the value of the polynomial 3x² - 5x - 42​

Answer 1

This is your answer

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Answer 2

Answer:-

Let,

p(x) = 3x² - 5x - 42

∴ p(- 2) = 3(- 2)² - 5(- 2) - 42

→ p(- 2) = 3(4) + 10 - 42

→ p(- 2) = 12 - 32

→ p(- 2) = - 20

∴ If x = (- 2), the value of p(x) becomes (- 20).