Răspuns:
Explicație pas cu pas:
-7+2(-8+5) = -7 + 2*(-3) = -7 - 6 = -13
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x-1/2 + x+1/4 = 2x - 2/4 + 1/4 = 2x - 1/4
daca fractiile erau (x-1)/2 si (x+1)/4:
(x-1)/2 + (x+1)/4 = (2x - 2 + x + 1)/4 = (3x - 1)/4
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1/2 + 1/64 + 1/48 = 96/192 + 3/192 + 4/192 = 103/192
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x - 7x ≤ 8x + 5
x - 7x - 8x ≤ 5
-14x ≤ 5
x ≤ - 5/14
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(x - 2)^2 + (x + 2)^2 = x^2 - 4x + 4 + x^2 + 4x + 4 = 2x^2 + 8
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1/8 + 1/4 + 1/2 = 1/8 + 2/8 + 4/8 = 7/8