Question

Phan tich da thuc thanh nhan tu:

2a+6b+15c

4m^2n-8m^2n-12n

a^4-b^4

16b^4-9c^2

5a(x+y)+x+y

Answer 1

b: \(4m^2n-8m^2n-12n\)

\(=-4m^2n-12n\)

\(=-4n\left(m^2+3\right)\)

c: \(a^4-b^4=\left(a^2-b^2\right)\left(a^2+b^2\right)=\left(a^2+b^2\right)\left(a-b\right)\left(a+b\right)\)

d: \(16b^4-9c^2\)

\(=\left(4b^2-3c\right)\left(4b^2+3c\right)\)

e: \(5a\left(x+y\right)+x+y=\left(x+y\right)\left(5a+1\right)\)