^2 - do drugiej potęgi
(2x-y)(x+y) = 2x^2 + 2xy - xy - y^2
(ab-a) (2ab+6a) = 2(ab)^2 +6a^2b - 2a^2b + 6a^2 = 2(ab)^2 +4a^2b - 6a^2
Odpowiedź:
G) (2x-y)(x+y)=2x²+2xy-xy-y²=2x²+xy-y²
H) (ab-a) (2ab+6a)=2a²b²+6a²b-2a²b-6a²=2a²b²+4a²b-6a²
lub
-6a²+4a²b+2a²b²
Szczegółowe wyjaśnienie:
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^2 - do drugiej potęgi
(2x-y)(x+y) = 2x^2 + 2xy - xy - y^2
(ab-a) (2ab+6a) = 2(ab)^2 +6a^2b - 2a^2b + 6a^2 = 2(ab)^2 +4a^2b - 6a^2
Odpowiedź:
G) (2x-y)(x+y)=2x²+2xy-xy-y²=2x²+xy-y²
H) (ab-a) (2ab+6a)=2a²b²+6a²b-2a²b-6a²=2a²b²+4a²b-6a²
lub
-6a²+4a²b+2a²b²
Szczegółowe wyjaśnienie: