Question

exercícios

1)(6 x -7 )•(2× +3)=

2)(4 x + 5 ) •(× +8)=

3)(3× -8)•(4× +1)=

4)(7 - 2)•(2× -9)=

5) 6ו (2× -6)=




OBS; só responde QUEM SABE ⚠️⚠️​

Answer 1

Resposta:

1) 12x$x^{2}$ + 4x - 21

2) 4$x^{2}$ + 37x+40

3) 12$x^{2}$ - 29x-8

4) 10x-45

Explicação passo-a-passo:

1)(6 x -7 )•(2× +3)=

6x.2x+6x.3-7x2x-7.3

12x$x^{2}$ + 6x.3-7.2x-7.3

12x$x^{2}$ +18x- 14x-21

2)(4 x + 5 ) •(× +8)=

4x.x+4x.8+5x+5.8

4$x^{2}$ +4x.8+5x+5.8

4$x^{2}$ + 32x+5x+40

4$x^{2}$ + 37x+40

3)(3× -8)•(4× +1)=

3x.4x+3x-8x4x-8

12$x^{2}$ +3x-32x-8

12$x^{2}$ -29x-8

4)(7 - 2)•(2× -9)=

5(2x-9)

5x2x-5x9

10x-45