x1:y1 = x2:y2 4:-2 = x2:5 x2 = (4*5)/-2 x2 = -10
x2 + 2y = 52 + 2*2 = 25 + 4 = 29
If x = 8 then x2 = 82 = 8 x 8 = 64
x2 + x - 30 = (x + 6)(x - 5)
x = +5 or x = -5
if x2 = 5 the value of x has to be 5 divided by 2 which is 2.5 x = 2.5
x=5/2 or 2.5
x1:y1 = x2:y2 4:-2 = x2:5 x2 = (4*5)/-2 x2 = -10
x2 + 2y = 52 + 2*2 = 25 + 4 = 29
If x = 8 then x2 = 82 = 8 x 8 = 64
f(x) = x2 + 3 ----> f(5) = (5)2 + 3 ----> f(5) = 28
x2 + x - 30 = (x + 6)(x - 5)
x = +5 or x = -5
x = +5 or -5
x2 + 2x - 15 = (x - 3)(x + 5)
If you have an equation of x2 plus x2, it is the same as saying 2 times x plus 2 times x. This can be written as 2x + 2x or x2 + x2. It is the same, then, as 4x. For example, if x equals 5: 2(5) + 2(5) = 10 + 10 = 20. 20 also equals 4(5).
x2 - 5x = 0x (x - 5) = 0x = 0andx = 5