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Dalibor Frivaldsky · Answer 1 · 2021-09-25T13:50:28+0000

Use the butterfly method: you need to find two numbers that add up to a times c = 15 times -2 = -30, and the same two numbers need to add up to -7.

These two numbers are -10 and 3.
(-10)(3) = 30 and -10 + 3 = -7

Factored form: ( x - 10 )( x + 3 )

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