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Earn +20 ptsQ: How do you do this problem 3 - 5x - 5 - 12x?
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3 - 5x - 5 - 12x?
After collecting like terms, (3 - 5x - 5 - 12x) reduces to (-2 - 17x).
What is 12x3 plus 17x2 plus 5x?
12x^3+17x^2+5x=0x(12x^2+17x+5)=0x(x+1)(12x+5)=0x=0x=-1x=-5/12
3x-8 plus 5x plus 39 plus 4 x plus 51 equals?
3x-8+5x+39+4x+51 = x(3+5+4) + -8 + 39 + 51 = 12x +82
4x2 - 12x plus 9 equals 5?
4x2 - 12x + 9 = 5; whence, 2x - 3 = ±√5, and 2x = 3 ±√5. Therefore, x = ½ (3 ±√5).
How do you solve this using the system of substitution y quals -3x 5 and 5x-4y equals -3?
Simply take the first equation and substitute it for y in the second one. We're told: y = -3x + 5 and: 5x - 4y = -3 So we can say: 5x - 4(-3x + 5) = -3 5x + 12x - 20 = -3 17x = 17 x = 1 Then plug that value into one of our original equations to solve for y: y = -3x + 5 y = -3(1) + 5 y = 5 - 3 y = 2 So the two equations intersect at the point (1, 2).
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