Question
Solution
x = 10 + 2√21 = 3 + 7 + 2√3 x √7 = √3 x √3 + √7 x √7 + 2√3 x √7 = (√3+√7)2 So x = (√3 + √7)2 So √x = (√3 + √7) Putting √x = (√3 + √7) in √x - (1/√x) we get, √x - (1/√x) = (√3 + √7) - (1/(√3 + √7) = (√3 + √7) - ((√3 - √7)) = 2√7 ` `
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If  x = 19 , find x 5 - 20  x 4 + 20  x 3 - 20x 2 + 20x  - 20 = ?
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If x2a = y2b =z2c ≠ 0 and x2 = yz, then the value of (ab + bc + ca) /bc is :
when x =4 and y =-6 then find the value of 27x³ +58x²y +31xy² +8y³?
Given that x = 80, y = -35 and z = -45, Determine the value of [(x³ + y³ + z³)/10³]
22% of ‘x’ is equal to 66% of ‘y’, then find the value of x: y.
If, 4x + y = 10, and 2xy = 8, and 4x > y, then find the value of 64x³ – y³.
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