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1. 3y^2+12y
(a+b)(a-b)=a^2 -b^2
(3y+12y)(3y-12y)=3y^2-12y^2
therefore .3y^2+12y=3y^2-2y^2
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A) 3y^2+12
=3(y^2+4)
=3(y^2+2^2) (a2+b2)=(a+b)2 - ab)
=3( y+2)2 -2y
=3(y^2+4+4y-2y)
=3(y^2+2y+4)
=3(y+2)(y+2)
B) 36x^2y-6xy^2
=6xy(6x-y)
C) a^2+24ab+144b^2
=a^2+(12+12)ab+144b^2
=a^2+12ab+12ab+144b^2
=a(a+12b)+12b(a+12b)
=(a+12b)(a+12b)
E) 1-81b^2
=1^2-(9b)^2
=(1+9)(1-9)
=(1+9)(1^2-3^2)
=(1+9)(1+3)(1-3)
D) x^2-4y^2
=x^2-(2y)^2
=(x+2y)(x-2y)
Plz mark it as brainliest
=3(y^2+4)
=3(y^2+2^2) (a2+b2)=(a+b)2 - ab)
=3( y+2)2 -2y
=3(y^2+4+4y-2y)
=3(y^2+2y+4)
=3(y+2)(y+2)
B) 36x^2y-6xy^2
=6xy(6x-y)
C) a^2+24ab+144b^2
=a^2+(12+12)ab+144b^2
=a^2+12ab+12ab+144b^2
=a(a+12b)+12b(a+12b)
=(a+12b)(a+12b)
E) 1-81b^2
=1^2-(9b)^2
=(1+9)(1-9)
=(1+9)(1^2-3^2)
=(1+9)(1+3)(1-3)
D) x^2-4y^2
=x^2-(2y)^2
=(x+2y)(x-2y)
Plz mark it as brainliest
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