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BECE Mathematics 2023 Paper

Question : 2

Total: 40

3 x^2+2 x-7

x=-3

Solution:

Concept:

Substitute the given value of

x

into the polynomial expression and simplify using the order of operations.

Explanation:

Start with the expression

3x^2 + 2x - 7

Substitute

x = -3

3(-3)^2 + 2(-3) - 7

Evaluate the power first:

(-3)^2 = (-3)(-3) = 9

So the expression becomes:

3(9) + 2(-3) - 7 = 27 - 6 - 7

Now simplify:

27 - 6 = 21

, and

21 - 7 = 14

Thus, the value of the expression is

14

Answer:

14

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