Given that 4x^2-32x-20+k is a perfect square find k
1 answer:
Answer:
Step-by-step explanation:
<u>Perfect square identity:</u>
<u>Completing the square:</u>
- 4x² - 32x - 20 + k =
- (2x)² - 2*2x*8 + 8² - 20 + k =
- (2x - 8)² - (20 - k)
<u>In order the given to be a perfect square, we need:</u>
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