Explicação passo-a-passo:
[tex]a)(5x + 1) \times 2 = 10x + 2[/tex]
[tex]b)( - x + 2) \times 2 = - 2x + 4[/tex]
[tex]c)( - 3 - 4) \times 2 = - 7 \times 2 = - 14[/tex]
[tex]d)(x + 1).(x - 1) = x {}^{2} - 1[/tex]
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(5X+1)*2
= 25x^2 + 2.1.5x+ 1
= 25x^2 + 10x + 1
B)
(-X+2)*2
= (-x+2).(-x+2)
= x^2 - 2x - 2x + 4
= x^2 - 4x + 4
C)
(-3x-4)*2
= (-3x-4).(-3x-4)
= 9x^2 + 12x + 12x + 16
= 9x^2 + 24x + 16
D)
(X+1).(X-1)
= x^2 - x + x - 1
= x^2 - 1
Verified answer
Explicação passo-a-passo:
[tex]a)(5x + 1) \times 2 = 10x + 2[/tex]
[tex]b)( - x + 2) \times 2 = - 2x + 4[/tex]
[tex]c)( - 3 - 4) \times 2 = - 7 \times 2 = - 14[/tex]
[tex]d)(x + 1).(x - 1) = x {}^{2} - 1[/tex]