4x (x + 6) - x² = 5x²
4x² + 24x - x² = 5x²
5x² - 4x² + x² - 24x = 0
2x² - 24x = 0
x² - 12x = 0
x.(x - 12) = 0
x' = 0 <= a resposta
x" - 12 = 0
x" = 12 <= a resposta
.
4x (x + 6) - x^2 = 5x^2
4×^2 +24× - ×^2 = 5×^2
3×^2 +24× = 5×^2
5×^2 -3×^2 - 24× = 0
2×^2 -24× = 0 ==> : (2)
×^2 -12× = 0
×.(×-12)=0 ===> ×'=0
(×-12)=0 ====> ×"=12
S: { 0, 12 } ◆
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Verified answer
4x (x + 6) - x² = 5x²
4x² + 24x - x² = 5x²
5x² - 4x² + x² - 24x = 0
2x² - 24x = 0
x² - 12x = 0
x.(x - 12) = 0
x' = 0 <= a resposta
x" - 12 = 0
x" = 12 <= a resposta
.
4x (x + 6) - x^2 = 5x^2
4×^2 +24× - ×^2 = 5×^2
3×^2 +24× = 5×^2
5×^2 -3×^2 - 24× = 0
2×^2 -24× = 0 ==> : (2)
×^2 -12× = 0
×.(×-12)=0 ===> ×'=0
(×-12)=0 ====> ×"=12
S: { 0, 12 } ◆