Question

do the sum 2x²= 2x+2 if x = -1 and another x = 1​

Answer 1

2*1 *1  = 2 * (-1) + 2

2 = -2+2+2

2 = 2

then theorm 1.3 : lhs+rhs = 4

2+2 = 4

ans = 4