Question

Wyrażenia algebraiczne :

6a - (2a - 3b) + (a - 6b)= ....

x^{2} - [xy - (x^{2} - 2xy - y^{2})+ y^{2}] - xy + y^{2}

Prosiłbym o dokładne wyliczenia a nie tylko wyniki :)

Answer 1

6a - (2a - 3b) + (a - 6b) = 6a - 2a + 3b + a - 6b = 5a - 3b x² - [xy - (x² - 2xy - y²) + y²] - xy + y² = x² - (xy - x² + 2xy + y² + y²) - xy + y² = x² - xy + x² - 2xy - y² - y² - xy + y² = -4xy + 2x² - y²

Answer 2

6a - (2a - 3b) + (a - 6b)= 6a-2a+3b+a-6b=5a-3b

 

x²-[xy-(x²-2xy-y²)+y²]-xy+y²= x²-(xy-x²+2xy+y²+y²)-xy+y²=

x²-xy+x²-2xy-y²-y²-xy+y²=2x²-4xy-y²