(9+а)^2=81+18а+а^2
(8-b)^2=64-16b+b^2
(3y-4)=9y^2-24y+16
(5a+6b)^2=25a^2+60ab+36b^2
Объяснение:
1. (9+а)^2 = 9^2 +2*9*а +а^2 = 81+18а+а^2
2. (8-в)^2 = 8^2 - 2*8*в + в^2 =64-16в + в^2
3. (3у - 4)^2 = (3у)^2 - 2*4*3у +4^2 = 9у^2-24у+16
4. (5а+6в)^2 = (5а)^2 + 2*5а*6в + (6в)^2 = 25а^2 + 60ав + 36в^2
(9+а)^2=81+18а+а^2
(8-b)^2=64-16b+b^2
(3y-4)=9y^2-24y+16
(5a+6b)^2=25a^2+60ab+36b^2
Объяснение:
1. (9+а)^2 = 9^2 +2*9*а +а^2 = 81+18а+а^2
2. (8-в)^2 = 8^2 - 2*8*в + в^2 =64-16в + в^2
3. (3у - 4)^2 = (3у)^2 - 2*4*3у +4^2 = 9у^2-24у+16
4. (5а+6в)^2 = (5а)^2 + 2*5а*6в + (6в)^2 = 25а^2 + 60ав + 36в^2