Question

oblicz:

a) 1-(z+5)(z-1)

b)2*k do kwadratu-(k-3)(2k+4)

c)-3(a+2b)(a-b)+3*a do kwadratu

Answer 1

a)1-(z+5)(z-1)=1-z do kwadratu-z-5z +5=-z do kwadratu-6z+6
b)2*k do kwadratu-(k-3)(2k+4)=2*k do kwadratu-2k do kwadratu-4k+6k+12=2k do kwadratu-2k do kwadratu-4k+6k+12=2k+12

c)-3(a+2b)(a-b)+3*a do kwadratu=-3a do kwadratu+3ab-6ab+6b do kwadratu+3a do kwadratu=6b do kwadratu-3ab