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im needing help with algebra

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2 Answers

 
 
6x^2-x-2 = (3x-2)(2x+1), inverse foil
x^2-3x+2x-6 = x(x-3) + 2(x-3) = (x+2)(x-3), by grouping
81y^2-36 = (9y+6)(9y-6), using the difference of two squares formula

Comments

awesome thank you very much. Also how would i factor
9x^2-36
x^2-11x+24.
 
which ones are
Quad Equations
factor by grouping
product sum
(x-12)(x-2)
9(x-2)(x+12)
(x-4)(x+4)

Comment

a2 -b2 = (a - b)(a + b)      

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81x2 - 36 = 9(9x2 - 4) = 9(3x - 2)(3x + 2)