Question

If 3 is a zero
of the polynomial
x²+2x-a,them find a​

Answer 1

Answer:

a = 3

Step-by-step explanation:

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Answer 2

$3 = {x}^{2} + 2x - a \\ = {3}^{2} + 2 \times 3 - a \\ = 9 + 6 - a \\ = 15 - a \\ - a = - 15 \\ = a = 15$

Step-by-step explanation:

value of a is 15

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