x=-8
You never square a whole equation. That's just silly.
12x + 9 = 10x + 1 Subtract 10x from both sides: 2x + 9 = 1 Sutract 9 from both sides: 2x = - 8 Divide both sides by 2: x = -4
10x - 5x + 5x = 10x
Equation of circle: x^2 +y^2 -10x +6y -15 = 0 Completing the squares: (x-5)^2 +(y+3)^2 = 49 square units Therefore center of circle is at (5, -3) and its radius is 7 units
x2 + 10x = 18 x2 + 2(5)x - 18 = 0 x2 + 2(5)x + 25 = 18 + 25 (x + 5) 2 = 43 x + 5 = 430.5 x=6.56(3sf)-5
12
10x+7=(-3) 10x=(-10) x=(-1)ans
(x+5)^2 and therefore x = -5
9
15x plus 392 is the answer since you dont have an equal sign
3x plus 10x - 7With out knowing what ' x ' actually is.. it will reduce down to.3x + 10 x - 7=13x - 7
x=-8
You find x. Oh! There it is!! ^ See?
25 x2+10x-14 = 0 Completing the square:- (x+5)2-14 = 0 (x+5)2-25-14 = 0 x+5 = the sqrt of 39 x = -5-/+ the sqrt of 39
12x - 6 = 10x +2 12x - 10x = 2 + 6 2x = 8 x = 4
25