展开 a(a-1)x^2+(2a^2-1)x+a(a+1)

解答

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a (a - 1) x^{2} + (2 a^{2} - 1) x + a (a + 1)

a^{2} x^{2} - a x^{2} + 2 x a^{2} - x + a^{2} + a

求解步骤

a (a - 1) x^{2} + (2 a^{2} - 1) x + a (a + 1)

= a x^{2} (a - 1) + x (2 a^{2} - 1) + a (a + 1)

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a x^{2} (a - 1) : a^{2} x^{2} - a x^{2}

= a^{2} x^{2} - a x^{2} + x (2 a^{2} - 1) + a (a + 1)

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x (2 a^{2} - 1) : 2 x a^{2} - x

= a^{2} x^{2} - a x^{2} + 2 x a^{2} - x + a (a + 1)

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a (a + 1) : a^{2} + a

= a^{2} x^{2} - a x^{2} + 2 x a^{2} - x + a^{2} + a

s im pl i f y (x - 2 y) + (2 y - 3 z) 3 + (3 z - x) 3

s im pl i f y \frac{2}{3} \cdot (- b + a) + b

s im pl i f y \frac{( 3 \frac{x}{5} )}{( 3 \frac{x}{4} )}

s im pl i f y \frac{( 12 a ^{2} \cdot b )}{( 15 a \cdot b ^{3} )}

s im pl i f y b^{7} + 1 b^{5}