Find the value of c that completes the square. x'2+42x+C

Question

asked Sep 9, 2021 204k views

1 Answer

Jterry · Answer 1 · 2021-09-14T19:41:06+0000

Answer:

441

Explanation:

x^2 + 42x + c

Take the coefficient of x

42

Divide by 2

42/2 = 21

Square it

21^2 =441

This is the value of c