Question

g) (3x2 + 9x - 5) + ( 2x2 - 8x - 3) =
h) ( 7x3 + 12 x2 - 4x + 3) + (- 5x2 + 7x - 4) =
i) (x2 + 11x + 2) + (-2x°- 8x - 5)=
j) (3x2 - 11x) + (- 7x2 + 12x + 9 ) =​

Answer 1

Resposta:

g) (3 x2+9x9-5)+(2x2-8x-3)=

6+81-5+4-8x-3 =

87-9-8x-3 =

78-8x-3=

70x-3=

x=63

s=63

h)(7x3+12x2-4x+3)+(-5x2+7x-4)=

21+24-4x+3+10+7x-4

45-4x+13+7x-4

41x+20x-4

61x +16x

x=77

s=77

l)(x2+11x+2)+(-2x-8x-5)=

x 13x+2+-16x-5 =

x15+80 =

x=95

s=95

j)(3x2-11x)+(-7x2+12x+9)=

6x-11x+-14+21x=

5x+-35x =

- 40x =

x= - 40

s - 40

Explicação passo-a-passo:

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