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Earn +20 ptsQ: How do you factor x2 plus 8x plus 15?
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Factor x2 plus 8x?
x2 + 8x = x(x+8)
What binomial is a factor of this trinomial x2 plus 8x plus 16?
x + 4
Factor X2 plus 8x equals -15?
x2 + 8x = -15 x2 + 8x + 15 = 0 since 15 = 5 x 3 and 5 + 3 = 8, then (x + 5)(x + 3) = 0 x + 5 = 0 or x + 3 = 0 x = -5 or x = -3
Vertex of x2 plus 8x plus 15?
(-4,-1)
Factorise x2 plus 8x plus 15?
(x+5)(x+3)
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