<span>А=E(потенциальная)=mgh=12*10*10=1200</span>
36y^3-60y^2+72y=12y(3y^2-5y+6)
x^2-10x+25-4y^2=(x-5)^2-4y^2=(x-5-2y)(x-5+2y)
<span>2x+8y-4 при y=3
2х+(8*3)-4
2х+24-4
2х+20
__________
Ответ: 2х+20</span>
2a^{4} b^{3} -2a^{3} b^{4} +6a^{2} b^{2} =2a^{2} b^{2}( a^{2}b-ab^{2} +3)
x^{2} -3x-3y- y^{2} =( x^{2} - y^{2} )-3(x+y)=(x-y)(x+y)-3(x+y)=(x-y)(x+y)-3(x+y)=(x+y)(x-y-3)
Тримай .......................................................