Please solve 1-21

Please solve 1-21 EXERCISE g, 21. 5 8 Jf p — = 9 and = '0, 0) peg 10 If x — 3 s — x y S find the value of (iii) 12 . find the value of (x —y)2. 13 If ' — 3 and 4, find — 14 15 If x + 19 20 21 lfa.2b - = 3 and ab = 2, find the value of 8a3 — 27b3. 4, find the values Of 16 If — 5, find val ue of _ , find the values of (iio (ii0 • 2, prove that x2 — 3, find the value of — 5, prove that + 125.

Dear student
1

x - y = 8 and xy = 5 Consider, {(x - y)}^{2} = x^{2} + y^{2} - 2 xy 8^{2} = x^{2} + y^{2} - 2 (5) 64 = x^{2} + y^{2} - 10 x^{2} + y^{2} = 74 Note : {(a - b)}^{2} = a^{2} + b^{2} - 2 ab

For remaining queries we request you to post them in separate threads to have rapid assistance from our experts.
Regards