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= m² - 2mn + n²
=(m - n)²
n²+25m(do4)-10m²n
= 25m(do4) - 10m²n +n² =
= ( 5m² - n)²
a²b²-2 tu nie wiem oco chodzi
9 -xdo4)y²
xdo4)-16
Doprowadz do najprostszej postaci:
(x-1)³+2(2-x)³=
= x³ - 3x²+ 3x- 1 + 2( 8 -3*4x+ 3*2*x² - x³=
= x³ - 3x²+ 3x - 1 + 16 -24x + 12x² - 2x³=
= -x³ + 9x²- 21x + 15
(x+1)(x²-x+1)+(1-x)³=
= (x³+ 1³) + (1-x)³=
= x³+ 1³ + 1- 3*1² *x + 3*1*x² -x³ =
= x³+ 2 -3x + 3x² -x³ =
= 3x²-3x +2