Question

Ex 11 Ex 13 Ex15
Va rog cu rezolvae!!!

Answer 1

11.
5a²b - 25ab²=5ab×(a-5b)
-18x⁴y⁵-24x⁵y⁴= - 6x³y³×(3x+4y)
13.
a) 5x²-10xy+5y²= 5x²-5xy-5xy+5y²=5x(x-y) -5y(x-y)= (5x-5y)(x-y)=5(x-y)(x-y)= =5(x-y)²
b) xy+6 -2x-3y= xy -2x-3y+6= x(y-2)-3( y-2)=(x-3)(y-6)
c) 3x-xy-3y+ y²= x(3-y)- y(3-y)= (x-y)(3-y)
d) 2ab+b+2a+b²=2ab+2a+b²+b=2a(b+1)+b(b+1)=(b+1)(2a+b)
15
a) 3xy(2x²-y³)+2xy⁴-5x³y=6x³y-3xy⁴+2xy⁴-5x³y= x³y-xy⁴
b) -√3 ab²(3ab-2√3 b)+3√3 a²b³+ab³=
-3√3 a²b³+ 6ab³+3√3 a²b³+ab³= 7ab³