x4 +x2 =x2 (x2+1)
x2+bx+ax+ab = x2+ax+bx+ab = x(x+a)+b(x+a) = (x+a)(x+b)
x2 + 8x + 15 = (x + 3)(x + 5)
x2 + 12x + 27 = (x + 9)(x + 3)
x3 + x2 + 4x + 4 = (x2 + 4)(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
x=-11
- If 3X - 1 = 11, what is the value of X^2 + X?
The factors of x2 are x and x x times x plus 1 = x2 + x
x4 +x2 =x2 (x2+1)
x4 - 1.We can not "solve" this as we have not been told the value of x. However, we can simplify this expression:We have an x and a minus x here which will cancel out. Likewise the x2 and x3 will cancel out with the -x2 and -x3 respectively. This therefore leaves us with just x4 - 1.
2x3 + x2 + 15 This is a 3rd order polynomial in 'x'. It's numerical value kinda depends on the value of 'x'.
You need to know the value of x
8
x2+bx+ax+ab = x2+ax+bx+ab = x(x+a)+b(x+a) = (x+a)(x+b)
(x2+10x+21)/(x+3) = (x+7)
The value of the expression x2 + 9 will depend on what value you plug in for x. If you are looking to factor that expression, it can only be done using complex numbers:x2 + 9 = (x + 3i)(x - 3i)