<span>40a</span>²<span>b</span>²<span>-4b</span>²<span>-100a</span>⁴<span>b</span>²<span> = 4b</span>²(10a²-1-25a⁴) = -4b²(25a⁴-10a²+1) = -4b²(5a²-1)²= -4b² (a√5-1)² (a√5+1)²
5.2*(0.1)/0.13*(0.4)= 100
1вид от x
y=2x-5
x•2-5=y
2x-5=y
2x=y+5
x=y+5/2
2x/2=y+5/2
2вид от у
y=x2-5
y=2x-5