Question

Me ajudem

A) (x+4)² < (x-3)²

B) 2 - x-1 ≤ 5
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10

Answer 1

A )(x+4)^2 < (x-3)^2
(x)^2+2(x)(4)+(4)^2 < (x)^2-2(x)(3)+(3)^2
x^2+8x+16 < x^2-6x+9
x^2+8c-16-x^2+6x-9 < 0
8x+6x-16-9 <0
14x- 25 <0
14x < 25
x < 25/14
x < 1,78

B)2 + x-1/10 < 5
20 + x-1 / 10 < 5
20 + x-1 < 5(10)
20 + x-1 < 50
x-1 + 20 < 50
x + 19 < 50
x < 50 - 19
x < 31