1.Zapisz w jak najprostszej postaci:
a) (a+3)(a-1)+(a-7)(a+5)=
b) (2b-5)(3-2b)-(3b+2)(b-6)=
c) -7c kwadrat (5c-4)+(3c kwadrat +c)(6-2c)=
d) (3m(m-4)(5m+2)-m(2m+3)(4-3m)=
e) -2x(3x-5y)-(x+2y)(3x-y)=
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" x^2 " = x do kwadratu (jakby co)
a) (a+3)(a-1)+(a-7)(a+5) = a^2 - a + 3a - 3 + a^2 + 5a - 7a - 35 = 2a^2 - 38
b) (2b-5)(3-2b)-(3b+2)(b-6) = 6b - 4b - 15 + 10b = 12b - 15
dalej nie mogę . mam nadzieję że chociaż w tym pomogłam... ;)