Question 181469
Solving Quadratic Equations by Factoring
(t-5)² = 2(5-t)
Modify:
(t-5)^2 = -2(t-5)
(t-5)^2 + 2(t-5) = 0
Factor:
(t-5)(t-5+2) = 0
(t-5)(t-3) = 0
t = 5 or t = 3
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Factoring
y² ( y + 1 ) -4y ( y + 1) -21 ( y + 1 ) 
(y+1)(y^2-4y-21)
(y+1)(y-7)(y+3)
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Factoring Trinomial squares and differences of squares.
(y-5)² - 36q²
= [(y-5)-6q][y-5+6q]
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Cheers,
Stan H.