15.
x=3
x2 + 3x - 15 = 0 you need to use the quadratic equation... since you have x to the second degree you will get two answers... yours two answers are... x = 2.6533 and -5.6533
if you want to "solve" this equation, you need an equals sign somehwere! For example, if the problem was 2x - 52=5 then you could solve. You add 52 (or 25) to both sides so the equation becomes 2x = 30. Then you divide both sides by 2 to get x=15
15
You fill in for x and solve the equation3(5)^2 - 2(5)15^2 - 10; now solve
15.
3x2 when x = 2 is the answer 3 X 4 = 12 or is the answer (3 X 2)2 = 62 = 36
x=3
x2 + 3x - 15 = 0 you need to use the quadratic equation... since you have x to the second degree you will get two answers... yours two answers are... x = 2.6533 and -5.6533
What about it? Factorise it?
if you want to "solve" this equation, you need an equals sign somehwere! For example, if the problem was 2x - 52=5 then you could solve. You add 52 (or 25) to both sides so the equation becomes 2x = 30. Then you divide both sides by 2 to get x=15
15
15 to the 2nd power or 15 squared equals 15 * 15 which equals 225.
x = 1
x2+x-15 = 0 Using the quadratic equation formula: x = 3.405124838 or x = -4.405124838
(x - 5)(x + 3)