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Zad. 1)
a) x-do potęgi 2 + x - 1 dla x = -1,
x² + x - 1 = (-1)² + (-1) - 1 = 1 - 1 - 1 = -1
b) 2(- x + 4) dla x = -10
2(10 + 4) = 2*14 = 28
c) 1 - y + x dla x = 2 i y = -1,
1 - (-1) + 2 = 1 + 1 + 2 = 4
Zad. 2)
a)
4a.5b = 20ab
b)
-3x. 3x = - 9x²
c)
-x.(-2x) = 2x²
d)
0,5y3t . 2y = 1,5ty²
e)
-xy . (-xy) = x²y²
f)
-3ab . (-6b) = 18ab²