1.(4m-2n)² 2.(2+3) 3.(3a-b)² 4.(r²-2s)² 5.-s(-2c+d)² 6.4(k-j)²-(k-2j)²

Jawaban:

1. (4m-2n)²=(4m-2n)(4m-2n)

=16m²-8mn-8mn+4n²

=16m²+4n²-16mn

3. (3a-b)²=(3a-b)(3a-b)

=9a²-3ab-3ab±b²

=9a²+b²-6ab