Question 26: Calculate: \((25x^2+10xy+4y^2) . (5x-2y) \)

04/01/2022 // by admin// Leave a Comment

Question 26: Calculate: \((25x^2+10xy+4y^2) . (5x-2y) \)

A. \(125{x^3} + 8{y^3}\)

B. \(125{x^3} – 8{y^3}\)

C. \(125{x^3} – 8{y^2}\)

D. \(25{x^3} – 8{y^3}\)

We have:

\( \left( {25{x^2} + 10xy + 4{y^2}} \right).\left( {5x – 2y} \right) = 125{x^3} – 8{y^3 }\)

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« Question 25: Find x, y, z knowing \(\frac{x}{{ – 2}} = \frac{y}{3} = \frac{z}{5};x + y + z = 18\ )

Question 26: Let the set X be a divisor of 35 and greater than 5. Let the set Y be a multiple of 8 and less than 50. Let M be the intersection of 2 sets X and Y, how many elements does the set M have? »

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