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Q: How do you factor x² plus 8x plus 5x plus 40?

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(5x - 7)(x + 3)

x2 + 13x + 40 = x2 + 5x + 8x + 40 = x(x + 5) + 8(x + 5) = (x + 8)(x + 5)

5x+8y = 40 8y = -5x+40 y = -5/8x+5 in slope intercept form

3(x2-x-7)

5x+8x+3x-2x = 14x

8x = 5x+24 8x-5x = 24 3x = 24 x = 8

x2 + 3x - 40 = x2 + 8x - 5x - 40 = x(x + 8) - 5(x + 8) = (x - 5)(x + 8)

5x+49 = 8x+13 49-13 = 8x-5x 36 = 3x x = 12

If that's 15x2, the answer is (3x + 4)(5x - 4)

8x-4 = -7+5x 8x-5x = -7+4 3x = -3 x = -1

8x-7 plus 2x equals 6 plus 5x plus 2?

5x+1+x-2 = 8x+6 5x+x-8x = 6+2-1 -2x = 7 x = -3.5

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