Question

(10-8)².;(9+7)²; (2a+5)²​

Answer 1

Răspuns:

a²+2×a×b+b² cred dddddddd

Answer 2

${(10 - 8)}^{2} = {2}^{2} = 4 \\ {(9 + 7)}^{2} = {16}^{2} = 256 \\ {(2a + 5)}^{2} = {(2a)}^{2} + 2 \times 2a \times 5 + {5}^{2} = \\ = 4 {a}^{2} + 20a + 25$