For the x intercepts, y = 0 ie 0 = 2x2 + 2x - 4 or x2 + x - 2 = 0 so that (x + 2)*(x - 1) = 0 So the intercepts are (-2,0) and (1,0)
2x2 + 11x + 15 = (x + 3)(2x + 5).
-7
No.
22 = 4
For the x intercepts, y = 0 ie 0 = 2x2 + 2x - 4 or x2 + x - 2 = 0 so that (x + 2)*(x - 1) = 0 So the intercepts are (-2,0) and (1,0)
2x2 equals 5
3
2x2 + 11x + 15 = (x + 3)(2x + 5).
8 - 2x2 = x + 22 - 7Combine like terms on the right side:8 - 2x2 = x + 15Subtract 8 from each side:-2x2 = x + 7Add 2x2 to each side:0 = 2x2 + x + 7
-7
x2 + x2 = 2x2
No.
22 = 4
2x2=4x4=16
The discriminant is 25.
The discriminant is -199.