Q11 of 59 Page 162

If x + = 3, find x2 + and x3 +

…Equation (i)


Squaring both sides of the equation we get




Cubing both sides of the equation (i) we get





More from this chapter

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9

If 4x2 + y2 = 40 and xy = 6, find 2x + y.

 10

If x – y = 3 and xy = 10, find x2 + y.

 12

If x + = 6, find x2 + and x4 +

13

Simplify:

(i) (x + y)2 + (x – y)2;


(ii) (x + y)2 × (x – y)2.