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x2 + 13x = -30 ∴ x2 + 13x + 30 = 0 ∴ (x + 3)(x + 10) = 0 ∴ x ∈ {-3, -10}
2x2+13x+15 = (2x+3)(x+5)
-9x - 3 - 3x = 4 + xcombine the -9x and -3x-12x - 3 = 4 + xsubtract x from each side-13x - 3 = 4add 3 to each side-13x = 7divide both sides by -13x = -7/13
x2 - 13x + 30 = (x - 3)(x - 10). In case you are provided with a list that you forgot to include with your question, then any of the following is a possible factor: x - 3; x - 10; 3 - x; or 10 - x.
5x-13x+6=0 5x-13x=-6 -8x=-6 -8x/-8=-6/-8 x = 3/4