factories of x2-2x-15
Answers
Answered by
8
Answer:
x²-2x-15
x²-5x+3x-15
x(x-5)+3(x-5)
(x-5)(x+3)
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Answered by
7
Answer:
x=-3 orx=5
Step-by-step explanation:
x ² - 2x -15 = y
let y =0
x ² - 2x -15 = 0
x ² - 5x +3x -15=0
x(x-5)+3(x-5)=0
(x+3)(x-5)=0
x=-3 or x=5
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