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marysya [2.9K]
3 years ago
6

X^2+6x-40=0 complete the square

Mathematics
1 answer:
slavikrds [6]3 years ago
3 0

Answer:

x = {4, -10}

Step-by-step explanation:

x^2+6x-40=0

x^2+6x+9 = 40+9

(x+3)^2 = 49

x+3 = 7

x+3 = -7

x = {4, -10}

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Let  the coordinates of C and D be (4,0) and (0,-28) respectively  and F is the midpoint of CD

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y= \frac{y_2+y_1}{2}=\frac{-28+0}{2}=\frac{-28}{2}=-14

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