What number must be added to complete the square?

x²-20x = 17

Question

Mathematics

Abagail Ortiz

19 February, 15:22

What number must be added to complete the square?

x²-20x = 17

+3

Answers (1)

Know the Answer?

Lyric Waller · Answer 1

Halve the linear coefficient, then square it.

(-20/2) ^2

(-10) ^2

100

So you would add 100 to both sides to complete the square

x^2-20x+100=117 now the left side is a perfect square

(x-10) ^2=117

What number must be added to complete the square?x²-20x = 17

What number must be added to complete the square?

x²-20x = 17