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Y2 + 14y + 49 = 0 Please help me :)

Y2 + 14y + 49 = 0 Please help me :)
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3 votes
Y2 + 14y + 49 = 0 Please help me :)

User Wolfetto
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1 Answer

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y^2+14y+49=0\\\\\underbrace{y^2+2\cdot y\cdot7+7^2}_((*))=0\\\\(y+7)^2=0\iff y+7=0\to y=-7\\\\-----------------------\\\\(*)\ \ \ (a+b)^2=a^2+2ab+b^2
User Bcmills
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