展开 (7x^2-yz)(3x^2+5yz)

解答

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(7 x^{2} - yz) (3 x^{2} + 5 yz)

21 x^{4} + 32 x^{2} yz - 5 y^{2} z^{2}

求解步骤

(7 x^{2} - yz) (3 x^{2} + 5 yz)

Apply FOIL method

(7 x^{2} - yz) (3 x^{2} + 5 yz) : 21 x^{4} + 32 x^{2} yz - 5 y^{2} z^{2}

= 21 x^{4} + 32 x^{2} yz - 5 y^{2} z^{2}

s im pl i f y 2 (x + 4)^{2} - 6

s im pl i f y 2 (x + 4)^{2} - 3

s im pl i f y 2^{1 - 2}

s im pl i f y - \frac{1}{5} - \frac{2}{3}

s im pl i f y \frac{6 ^{- 2}}{6 ^{- 1}}