Question

Sendo A = -2x + 5, B = 4 - 5x e C = 4x - 1, Determine: C² - 3a . 2b

Answer 1

4x -1 .4x-1 3(-2x+5)2 (4-5x)
4x-1.4x-1 3 -2x+5 2 4 -5x
4x 4x -2x -5x -1 -1 +5 2 4
13x -2x -2 +11
11x 9
2x

Answer 2

C² = 4x - 1
3a =3 (- 2x + 5)
2b = 2( 4 - 5x)
16x - 1 + 6x + 15 x 8 - 10x=
12x + 120

Eu acho
Espero ter ajudado!