4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)
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∙ 2009-11-29 11:31:394x2 + 12x + 5 = (2x + 1)(2x + 5).
x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
12x + 5 - 2x =(12x - 2x) + 5 =10x + 5 =5 (2x + 1)
x(x+5)
(x+5)(x+3)
42
4x2 + 12x + 5 = (2x + 1)(2x + 5).
2(2x-11)(3x+5)
x2+12x+5 = 3 x2+12x+5-3 = 0 x2+12x+2 = 0
16X + 5
X=5
12x + 5 - 2x =(12x - 2x) + 5 =10x + 5 =5 (2x + 1)
5/4x+7/12x is the same as 15/12x+7/12x = 21/12x
x(x+5)
12x^3+17x^2+5x=0x(12x^2+17x+5)=0x(x+1)(12x+5)=0x=0x=-1x=-5/12
-5 + 12x = 18x + 7Subtract 7 from each side:-12 + 12x = 18xSubtract 12x from each side:-12 = 6xDivide each side by 6:-2 = x
(x-1)(2x+5)