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CaHeK987 [17]
2 years ago
13

Solve by completing the square.

Mathematics
1 answer:
Leona [35]2 years ago
3 0

Answer:

28- 4±\sqrt{21}

30- -4±2i

Hope this helps!

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4x-5y=15\\\\4x-5y+5y=15+5y\\\\4x+0=15+5y\\\\4x=5(3)+5(y)\\\\4x=5(3+y)\\\\\frac{1}{5}*4x= \frac{1}{5}*5(3+y) \\\\\frac{4x}{5}=3+y\\\\\frac{4x}{5} -3=3+y-3\\\\\frac{4x}{5} -3=y+0\\\\y=\frac{4x}{5} -3\\\\y=\frac{4}{5}x-3

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m=\frac{4}{5} \\\\b=-3

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