=m²-6mn+9n²
=64k²+1.6kn+0.01n²
=x⁴-49
=(x+2)(x²-2x+4)
=(7/3z-3y³)²=49/9z²-2*7/3*3zy³+9y⁶=49/9z²-14zy³+9y⁶
Легко.
1)2x^2 - 11x +12 = 0
a = 2, b = 11, c= 12
D = b^2-4ac=2^2 - 4 x 2 x 12 = -92
2) x^2 - 36x +324 = 0
a = 1, b = 36, c = 324
D = b^2-4ac=36^2-4 x 1 x 324 = 0
x1 = -b-корень D / 2a = -36 - 0 / 2 = -18
V=√2gh , h=?
v²=2gh
h=v²/2g
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1. а)= 121-22х+х²
б)= 4х²+2х+0,25
в)=9а²-12аб+4б²
г)а⁴+2а²б³+б^6
.
2.а)=х²-14х+49=(х-7)²
б)=(5у+2х)²
.
3.а)=25х²-30ху+9у²+30ху=25х²+9у²
б)=4х⁴-2(х^8+2х⁴+1)=4х⁴-2х^8-4х⁴-2=-2х^8-2=-3(х^8+1)