499
punti
Livello 1
a/3+4a/3 = 5a/3
-3x^2/5-7x^2/5 = -10x^2/5 = -2x^2
-7y^2/5+y^2/15 = ((-3*7)y^2+y^2)/15 = -20y^2/15 = -4y^2/3
142414
punti
Genius III
93)
$+\frac{1}{3}a-\big(-\frac{4}{3}a\big)$ =
= $+\frac{1}{3}a+\frac{4}{3}a$ =
= $+\frac{5}{3}a$
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$-\frac{3}{5}x^2-\big(+\frac{7}{5}x^2\big)$ =
= $-\frac{3}{5}x^2-\frac{7}{5}x^2$ =
= $-\frac{10}{5}x^2$ =
= $-2x^2$
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$-\frac{7}{5}y^2-\big(-\frac{1}{15}y^2\big)$ =
= $-\frac{7}{5}y^2+\frac{1}{15}y^2$ =
= $\big(\frac{-21+1}{15}\big)y^2$ =
= $-\frac{20}{15}y^2$ =
= $-\frac{4}{3}y^2$
68261
punti
Genius I
@gramor grazie mille
@Margherit - Grazie a te, di nuovo saluti.