Equation for Alegbra 2

Question

Use the correct properties and methods to simplify 2(k+4)(k-2)

 

 

 

Now let k=5 and evaluate the expression.

Answer 1

2(k+4)(k-2) = 2(k² + 2k -8) = 2k² + 4k -16

If k = 5, 2(5)² + 4(5) - 16 = 50 + 20 - 16 = 54

Answer 2

2(k + 4)(k - 2)

2(k² + 2k - 8)       FOIL

2k² + 4k - 16        distribute

 

Can you evaluate for k = 5?