5,3b-6-5*(3,7b-0,7)
5,3b-11*(3,7b-0,7)
5,3b-40,7b+7,7
-35,4b
-35,4*3/4=18,85
2n(n-5)-3a(n-5)=(n-5)(2n-3a)
1/16=(1/2)⁴
(1/2)^4log1/2 5=(1/2)^log1/2 5^4=5^4=625
(4x-3)(4x+3)-(3x-4)²=10x-25
1) (3x-4)²=(3x-4)(3x-4)=9x²-12x-12x+16=9x²-24x+16
2) (4x-3)(4x+3)=16x²+12x-12x-9
16x²-9-(9x²-24x+16)=10x-25
16x²-9-9x²+24x-16-10x+25=0
7x²+14x=0
7x(x+2)=0
x1=0
x2=-2