Factorising -x2 + 7x + 18:
(a - x)(x + b) = -x2 + (b - a)x + ab
so ab = 18, b - a = 7 giving a = 2, b = 9:
(2 - x)(x + 9)
9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
It is a pair of expressions -24 and 7x + 18 which are unrelated to one another.
-(x - 9)(x + 2)
It is an equation and the value of x is 2
Do you mean: 5x + 9 - 7x + 6 = x - 18 If so, you can solve this question at this manner: -2x + 15 = x - 18 3x = -3 x = -1
9x+6 = 7x+18 9x-7x = 18-6 2x = 12 x = 6
It is a pair of expressions -24 and 7x + 18 which are unrelated to one another.
7x + 6 = -18 7x = -24 x = -24/7 x = -3.428571 recurring (that is, -3.428571428571...)
(x2 + 7x - 18) = (x + 9)(x - 2)
x^2 + 7x -18 = (x - 2)(x + 9)
To simplify the expression 18 + 7x - 12 + 5x, you first combine like terms. Combine the constants (18 and -12) to get 6. Then, combine the x terms (7x and 5x) to get 12x. Therefore, the simplified expression is 6 + 12x.
6x+x=7x
x2+7x-18 = (x+9)(x-2) when factored
-(x - 9)(x + 2)
It is an equation and the value of x is 2
Do you mean: 5x + 9 - 7x + 6 = x - 18 If so, you can solve this question at this manner: -2x + 15 = x - 18 3x = -3 x = -1
The value of x2+7x+10 depends on the value of X. If x=1, then x2+7x+10 = 18 If x=2, then x2+7x+10 = 28 If x=3, then x2+7x+10 = 40 and so forth