2x2 + 5x - 3
(2x - 1)(x + 3)
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The answer is 21
3x4 plus 5x3 plus x2 - 5 divided by x 2 =[(3x4) + (5x3) + (x2 - 5)]/x2 =(12 + 15 + x2 -5)/x2 =(27 - 5 + x2)/x2 =(22 + x2)/x2
2x2 + 4 + 1 = 2x2 + 5 So, the vertex is (0, 5)
2x2+13x+15 = (2x+3)(x+5)
d/dx 2x2+3x+7=4x+3