2(4)^2 - 1 = 4(4) + 15
31 = 31
yes!
2x2 + 11x + 15 = (x + 3)(2x + 5).
What is the solution set of 2x2 + x = 15
2x2+13x+15 = (2x+3)(x+5)
2x2 + 15 = 11x ? Can be only for some values of x.2x2 + 15 = 11x subtract 11x to both sides2x2 - 11x + 15 = 0(2x - 5)(x - 3) = 02x - 5 = 0 or x - 3 = 0x = 5/2 or x = 3
2x2 + 7x - 15 = 02x2 + 10x - 3x - 15 = 0(2x2 - 3x) + (10x - 15) = 0x(2x - 3) + 5(2x - 3) = 0(2x - 3)(x + 5) = 0(2x - 3) = 0 or (x + 5) = 0x = 3/2 or x = -5
The answer is 35. 2x2-6x+15 2(-2)2-6(-2)+15 8+12+15 35. And this is not calculus...
It equals 285
45
2x2 + 7x - 15 = (2x - 3)(x + 5)
30
-9
15 plus -3 equals 12 12 divided by -6 equals -2