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(3a-2v-1) (4a-3b+5) =12a2-9ab+15a-8av+6vb-10v-4a+3b-5 =12a2-9ab+11a-8av+6vb-10v+3b-5
(6x-y) (4x+7) =24x2+42x-4xy-7y
(3m razy 2) (2m razy 1) =nie jestem pewny ale cyba bedzie 12 sprawdz z innymi odp
(2a+3) (2a-5) =4a2-10a+6a-15=4a2-4a+15
(3a-2b-1) (4a-3b+5) = 12a² - 9ab + 15a - 8ab + 6b² - 10b - 4a + 3b - 5 = 12a² + 6b² - 17ab + 11a -7b - 5
(6x-y) (4x+7) = 24x² + 42x - 4xy - 7y
(3m razy 2) (2m razy 1) = 6m * 2m = 12m²
(2a+3) (2a-5) = 4a² - 10a + 6a - 15 = 4a² - 4a - 15
b. 12a²-9ab+15a-8av+6bv-10v-4a+3b-5=12a²-9ab+11a-8av+6bv-10v+3b-5
c. 24x²+42x-4xy-7y
d.6m×3m=12m²
e. 4a²-10a+6a-15= 4a²-4a-15