Question

Упростите: 7 (5 a+8)-11 а (3 а -21) -2а-(17-8а)

Answer 1

35а+56-33а^2+231a-2a-17+8a=272a+39-33a^2

Answer 2

35 а +56-11 а =24 а+56
3а-21-2а-17+8а=9а-38

Answer 3

7 + 5 + 8 - 11 + a + 3 + a - 21 - 2a - 17 + 8a

Combine like terms: 7 + 5 + 8 - 11 + 3 - 21 - 17 = -6 a + a - 2a + 8a = 6a

Substitute the simplified values back into the expression: -6 + 6a - 2a - 17 + 8a

Combine like terms: 6a - 2a + 8a = 12a

Substitute the simplified value back into the expression: -6 + 12a - 17

Combine like terms: -6 - 17 = -23

So the simplified expression is: 12a - 23