Question

( left.|a|+|b|=18 quad|2 N=| begin{array}{l}15 1end{array}right} )
( a^{2}+b^{2}+2 a+c+0=-1+4 )
( 12^{2}+a^{2}=b^{3} )
( Rightarrow quad 124+a^{2}=b^{3} quadleft(m_{2} l ) fythgous right.
( Rightarrow quadleft(44-a^{2}-(18-a)^{2}right. )
( 144-9^{2}=a^{2}-36 a+324 )
( Rightarrow quad 36 q=180 )
( Rightarrow quad a=5 )
(0) ontion ( therefore b=13 )
[
begin{array}{l}text { gine nating } R 12end{array}
]

# 17. The sum of the magnitudes of two forces acting at a point is 18 N and the magnitude of their resultant is 12 N. If the resultant is at 90° with the smaller force, the magnitude of the forces in newton are (a) 6, 12 (6) 11,7 (c) 5. 13 (d) 14, 4 lif

Solution