Question

уравнение и остальное.....................

Answer 1

вариант 1
1. a) (2a-3b)²=4a²-12ab+9b²
b) (a+2b)(a²-2ab+4b²)=
=a^3+8b^3

2. a) 4a²-9b²=(2a-3b)(2a+3b)
b) -4x²+8x-4= -(4x²-8x+4)=
= -(2x-2)²

3. (2x-1)²=(2x+3)(2x-3)
4x²-4x+1-(4x²-9)=0
4x²-4x+1-4x²+9=0
-4x= -10
x=10/4=2.5

5. (24²-11²)/(49²-36²)=
=(24-11)(24+11)/(7-6)(7+6)=
=(13*35)/(1*13)=35/1=35