zodiacpumpkin1126
13.04.2021 •
Mathematics
Given that 4x^2-32x-20+k is a perfect square find k
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Ответ:
Step-by-step explanation:
Perfect square identity:
(a + b)² = a² + 2ab + b²Completing the square:
4x² - 32x - 20 + k = (2x)² - 2*2x*8 + 8² - 20 + k =(2x - 8)² - (20 - k)In order the given to be a perfect square, we need:
20 - k = 0k = 20Ответ:
y=1/2x+6 is the slope formula, so 1/2 is the slope
y=mx+b is the slope formula
The y-intercept is (0,6)