<span>12,25-3x^2=6x^2
(1225/100)-3x^2=6x^2
(49/4)-3x^2=6x^2
-3x^2-6x^2=-(49/4)
-9x^2=-(49/4)
x^2=(49/36)
x=+-(7/6)
x</span>₁<span>=7/6
x</span>₂<span>=-(7/6)
</span>
S=a*b
p=2*(a+b)
a*b=2*(a+b)
3x*4x=2*(3x+4x)
12x^2=14x
12x^2-14x=0
2x*(6x-7)=0
2x=0
6x-7=0 6x=7 x=7/6
3x=7/2
4x=14/3
0,01a=10⁻²·a
-2+(-3)=-5- это порядок числа 0,01а
Ответ:-5