Question

the value of the following expression when x is equal to -1. (a) 2x-7. (b) x²+2x+1​

Answer 1

-1×2-7= -2-7= -9

(-1)²+2(-1)+1=1-2+1=2-2=0

Answer 2

Answer:

a) -9 b) 0

Step-by-step explanation:

a) 2x-7 = 2 * -1 - 7

           = -2 -7

           = -9

b) x²+2x+1​ = -1² + 2 * - 1 + 1

                 = 1 + (-2) + 1

                 = 1 - 2 + 1

                 = -1 + 1

                 = 0