Solve for y y^2-11y-12=0

Math
y2-11y-12=0
Factor y2-11y-12 using the AC method.
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Consider the form x2+bx+c. Find a pair of integers whose product is c and whose sum is b. In this case, whose product is -12 and whose sum is -11.
-12,1
Write the factored form using these integers.
(y-12)(y+1)=0
(y-12)(y+1)=0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0.
y-12=0
y+1=0
Set the first factor equal to 0 and solve.
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Set the first factor equal to 0.
y-12=0
Add 12 to both sides of the equation.
y=12
y=12
Set the next factor equal to 0 and solve.
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Set the next factor equal to 0.
y+1=0
Subtract 1 from both sides of the equation.
y=-1
y=-1
The final solution is all the values that make (y-12)(y+1)=0 true.
y=12,-1
Solve for y y^2-11y-12=0

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