<span>(m-1)(m²-7m)+(m-1)(5m+1) =(m-1)(m²-7m+5m+1)=(m-1)(m²-2m+1)=
=(m-1)(m-1)²=(m-1)³</span>
S₆ = b₁(1+q+q²+q³+q⁴+q⁵) = 2(1+3+9+27+81+243) = 2*364 = 728
А) 5х-150=0
5x=150
x=30
Ответ: {30}.
б) <span>48-3х=0
-3x=-48
x=16
Ответ: {16}.
в) </span><span>-1,5х-9=0
-1,5x=9
x=-6
Ответ: {-6}.</span>
−6t2(2t7−3k)+5(4t9−2k)= -12t(14t-3k) +(900t-10k) =-168t+36tk+900t-10k=-168t+26tk+10tk+900t-10k=-142t+k+t+900t=758t+t+k=759t+k