Id x2 = 169, then x = ±√169 = {-13, +13}
You don't. This expression does not have any factors.
If you are looking to factor this expression, then it does not have a real solution.
x2-81 = (x-9)(x+9)
If by "what is the answer to" you mean, "how do you factor", then there is no answer, as this expression can not be factored. If you're asking to solve for x where the expression above is equal to zero, then x is equal to 16.
(x-8)(x+8) = x2-64
3x2(x2 - 3)
That expression can not be factored.
x(x - 2)
Id x2 = 169, then x = ±√169 = {-13, +13}
It is: (x-4)(x+4)
You don't. This expression does not have any factors.
If you are looking to factor this expression, then it does not have a real solution.
This is an expression and you do not solve an expression, but you can factor this one.X2 + 3X4X2(1 + 3X2)========
x2 - 2x - 24 = (x - 6)(x + 4)
If the expression is, x2 + 2x - 15 this has factors of (x + 5)(x - 3). If the expression is, x2 - 2x - 15 then the factors are (x - 5)(x + 3)
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