Question

Which of the following quadratic equations have x=3 as one of its roots.
(A) x²-8x+15=0
(B) x² +8x +15=0
(C) x²-8x-15=0
(D) x²+8x -15=0​

Answer 1

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a) x² - 8x + 15 = 0

3² - 8 × 3 + 15 = 0

9 - 24 + 15 = 0

-15 + 15 = 0

0 = 0

Answer 2

Step-by-step explanation:

3^2-8×3+15=0

9-24+15=0

-15+15=0

0=0

hence correct answer is option A