8.5x + 8 = 1.3x + 15
7.2x = 7
x = 0.972222(repeating)
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13x + 15 = 11x - 5 2x = -20 x = -10
2x2+13x+15 = (2x+3)(x+5)
7x-5+2x=3-4x+12 7x+2x-5=3+12-4x 9x-5=15-4x 9x+4x-5=15-4x+4x 13x-5=15 13x-5+5=15+5 13x=20 13x/13=20/13 x=20/13
2x^2 + 13x + 15 factored means that the two numbers must multiply to the constant (15) and add to equal the coefficient on the X (13). So it becomes: (2x + 3) (x + 5). If expanded, 2x*5 = 10x and 3 * x = 3x which add to 13x. And 5 * 3 = 15
It equals 285