x2+12x+11=0 (x+11)(x+1)=0 x=-11 or x=-1
The equation is equivalent to: -3x2 - 12x - 1 = 0 [you could change signs to get 3x2 + 12x + 1 = 0 but that is not required] The discriminant is (-12)2 - 4*(-3)(-1) = 144 - 12 = 132
2x2 - 13x - 7 = (2x + 1)(x - 7)
If you mean: 13*(x -1) +6 then it is 13x -13 +6 = 13x -7 as an expression
x . 9 =12-3x9x =12-3x9x+3x=1212x =12x =1
3 -x = 12x -1 add x to both sides 3 = 13x -1 add 1 to both sides 4 = 13X divide both sides by 13 4/13 = x
3 - x = 12x - 1 Add x to both sides of the equation: 3 = 13x - 1 Add 1 to both sides of the equation: 4 = 13x Divide both sides of the equation by 13: 4/13 = X
x = -1.
3x+12x = 15 15x = 15 x = 1
8x-3+6x-1 = 12x+614x-4 = 12x+614x-12x = 6+42x = 10x = 5
6y
3x2 + 12x = - 1 ie 3x2 + 12x + 1 = 0 has no rational roots. The irrational roots are [-12 +/- sqrt(132)]/6 = -3.915 and -0.085
207
13(1)-7(1)=6.
6x2+13x-5 = 0 (2x+5)(3x-1) = 0 x = -5/2 or x = 1/3
The measure of the sides of the triangle is 12x +2, 13x +1 and x-15. Give the value of each side.
10x-7y=-110x+1=7y-2x -10x-1=-25-12x-1=-25-12x=-24x=-24/-12x=210(2)-7y=-120-7y=-121=7y21/7=yy=3