1) x^2 - x = 0
x • (x - 1) = 0
x = 0
x - 1 = 0
x1 = 0
x2 = 1
2) 49^4 - 49^3 = (49 - 1) • 49^3 = 48 • 49^3
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<span><span>(80+30)/2=55</span></span>
А) 3*(z²-4)=3*(z-2)(z+2)
б) 5(a²+2a+1)=5(a+1)²
в) 2(b³+27)=2(b+3)(b²-3b+9)
г) 3(m³-27)=3(m-3)(m²+3m+9)
д) x(x²+2x+1)=x(x+1)²
е) m(1-m²)=m(1-m)(1+m)