Question

Solve it .Only one question​

Answer 1

we consider root as $

2$3+$7 $3-2$7 2(3)-4$21+$21-2(7) 6-3$21-14 -(8+3$21)

______ × _______ = _______________= ________= _______= (8/25)+3/25($21)

$3+2$7 $3-2$7 3-4(7) 3-28 -25

SO,a=8/25

3/25×15/15=1/5×15/25=15/125

b=1/125