<span> -15a-b-2+14a=-a-b-2</span>
1)25p2-10p+1=0
D=(-10)^2-4×1×25=100-100=0
x=-(-10)/2×25=10/50=0,2
2)(x+1)^2=(2x-1)^2
x2+2x+1=4x2-4x+1
-3x2+6x=0
-3x(x-2)=0
-3x=0 или x-2=0
x1=0 x2=2
D =|x₂ -x₁|;
x²+4x-1 =0;
x₁= -2 -√(2² +1) = -2 - √5 ;
x₂ =-2 + √(2² +1) = -2 +√5;
d =|x₂ -x₁|=|-2 +√5 -(-2-√5)| =2√5.
X⁸-24=(x⁴)²-24=8<span>²-24=64-24=40</span>