2x2 - 9x + 10 = 2x2 - 4x - 5x + 10 = 2x(x - 2) - 5(x - 2) = (x - 2)(2x - 5)
2x2 + 10 - 9x = 0 or 2x2 - 9x + 10 = 0 So (x - 2)*(2x - 5) = 0
2x+5=11 2x=6 x=3
9x-8=7x-3 9x-7x=-3+8 2x=5 x=5/2 x=2.5
If: 2x2-9x-5 = 0 Then: (2x+1)(x-5) = 0 Therefore:: x = -1/2 or x = 5
-3
2x2 - 9x + 10 = 2x2 - 4x - 5x + 10 = 2x(x - 2) - 5(x - 2) = (x - 2)(2x - 5)
2x2 + 10 - 9x = 0 or 2x2 - 9x + 10 = 0 So (x - 2)*(2x - 5) = 0
2x/5
2x+5=11 2x=6 x=3
3x-2x-3x+6 = 5-10x+9x-5 Clean up both sides (the fives on the right cancel out) -2x + 6 = -1x add 2x to both sides 6 = x ■
9x-8=7x-3 9x-7x=-3+8 2x=5 x=5/2 x=2.5
If: 2x2-9x-5 = 0 Then: (2x+1)(x-5) = 0 Therefore:: x = -1/2 or x = 5
6x - 7
2x2 + 10 = 9x 2x2 - 9x + 10 = 0 (x - 2)(2x - 5) = 0
2x2 + 9x + 10
2x + 5 = -76 - 7x Add 7x to both sides: 9x + 5 = - 76 Subtract 5 from both sides: 9x = -81 Divide both sides by 9: x = -81/9 = -9