What is 8x + 4 = 6x - 8?
8x+4=6x-8 (collect like terms) 8x-6x=-4-8 ( when you switch #s to the opposite side they switch from negative to positive) 2x=-12 (when you divide the sign doesnt switch anymore so you devide -12/2) x=-12/2 x=-6
Evaluate D(x)= 4x^10 + 6x^8 - 8x^7 - 2x^5 - 2x^4 - 7x^2 + 5 for x = -1?
Substitute x = -1 into the formula d(-1) = 4(-1)^10 + 6(-1)^8 - 8(-1)^7 - 2(-1)^5 - 2(-1)^4 - 7(-1)^2 + 5 = 4 + 6 + 8 + 2 - 2 - 7 + 5 = 16 ==> remainder of 16