3(1.2x+3y)-2(0.3x-13y)=3.6x+9y-0.6x+26y=3x+35y
x=1.5 3*1.5+35y= 4.5+35y
4х+у=3 *2
6х-2у=1
8х+2у=6
6х-2у=1
8х+2у+6х-2у=6+1
14х=7
х=14/7
х=2
4*2+у=3
8+у=3
у=3-8
у=-5
M⁸ - 6m⁴ n⁵ + 9n¹⁰ = (m⁴)² - 6 m⁴n⁵ + (3n⁵)² = (m⁴ - 3n⁵)²
36x¹² + y⁶ + 12x⁶y³ = (6x⁶)² + 12x⁶y³ + (y³)² = (6x⁶ + y³)²
![\frac{1}{225} a^{6}-2 a^{3} b^{2}+225 b^{4} =( \frac{1}{15} a^{3}) ^{2}-2 a^{3} b^{2}+(15 b^{2}) ^{2}=( \frac{1}{15} a^{3} -15 b^{2}) ^{2}](https://tex.z-dn.net/?f=+%5Cfrac%7B1%7D%7B225%7D++a%5E%7B6%7D-2+a%5E%7B3%7D+b%5E%7B2%7D%2B225+b%5E%7B4%7D+%3D%28+%5Cfrac%7B1%7D%7B15%7D+a%5E%7B3%7D%29+%5E%7B2%7D-2+a%5E%7B3%7D+b%5E%7B2%7D%2B%2815+b%5E%7B2%7D%29+%5E%7B2%7D%3D%28+%5Cfrac%7B1%7D%7B15%7D++a%5E%7B3%7D+-15+b%5E%7B2%7D%29+%5E%7B2%7D++++++++++++)