(m-7)/(pm -m²) - (7-p)/(pm -p²) =(m-7)/(pm -m²) - (p-7)/(p² -pm) =
(m-7)/(m(p -m) - (p-7))/(p(p-m) = ( p(m-7) -m(p-7) ) /mp(p-m) =(pm -7p -mp+7m)/mp(p-m) =7(m-p)/mp(p-m) = -7/mp.
Решение
sin²x + sinx - 2 = 0
sinx = t, t ∈ [-1;1]
t² + t - 2 = 0
D = 1 + 4*1*2 = 9
t₁ = (- 1 - 3)/2 = - 2 ∉ [-1;1]
t₂ = (-1 + 3)/2 = 1
sinx = 1
<span> x = π/2 + 2πk, k ∈ Z</span>
No1 а)411*4-9=1644-9=1635
б)6-5:6-3=6-3-5/6=3-5/6=2 и 1/6
в) (2-2)*3=6-6=0
2.а)(x-3)4*x14=4x*x*14-3*4*x*14=56x^2-168x
б)1.5a2b-3*4a-3b*4=3ab-12a-12b=3(ab-4a-4b)