Question

Answer 1

a: =(4x-3)(4x+3)

b: \(=\left(3a-5b^2\right)\left(3a+5b^2\right)\)

c: \(=\left(3-y\right)\left(3+y\right)\left(9+y^2\right)\)

d: \(=\left(2x+y+1\right)\left(2x+y-1\right)\)

Answer 2

a) \(=\left(4x^2\right)-3^2=\left(4x-3\right)\left(4x+3\right)\)

b) \(=\left(3a\right)^2-\left(5b^2\right)^2=\left(3a-5b^2\right)\left(3a+5b^2\right)\)

c) \(=9^2-\left(y^2\right)^2=\left(9-y^2\right)\left(9+y^2\right)\)

d) \(=\left(2x+y\right)^2-1^2=\left(2x+y-1\right)\left(2x+y+1\right)\)

e) \(=\left(x+y+z-x+y+z\right)\left(x+y+z+x-y-z\right)=\left(2y+2z\right)2x=4x\left(y+z\right)\)