(m+3)²-(m-9)(m+9)=m²+6m+9-(m²-81)=m²6m+9-m²+81=6m+100
400*5/100=400*0.05=20
75*0.2=15
16*0.5=8
40*0.75=30
240*1.5=360
35*0.07=2.45
Чтобы найти точки надо
<span> -5x + 9 = 2x + 2.
-5x -2x=-9+2
-7x=-7
x= (-7)/(-7)
x=1
</span><span>y = 2x + 2.</span>
y=2*1+2
y=4
(1.4)
(3х-1)^2+(4х+2)^2=5(х-1)(5х+1)
9x^2-6x+1+16x^2+16x+4=5(5x^2-5x+x-1)
25x^2+10x+5=25x^2-20x-5
10x+20x=-10
30x=-10
x=-10/30
x=-1/3
Ответ:-1/3