展开 (x^2-49)(2+sqrt(x-3))

解答

展开

(x^{2} - 49) (2 + x - 3)

2 x^{2} + x^{2} x - 3 - 98 - 49 x - 3

求解步骤

(x^{2} - 49) (2 + x - 3)

Apply FOIL method

(x^{2} - 49) (2 + x - 3) : 2 x^{2} + x^{2} x - 3 - 98 - 49 x - 3

= 2 x^{2} + x^{2} x - 3 - 98 - 49 x - 3

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roo t s \frac{a ^{2} b ^{2} c ^{2}}{( x - a ) ( x - b ) ( x - c )}