Answer:
Width= 3 inch
Length= 6 inch
Step-by-step explanation:
we need to solve this problem by simultaneous equations
First equation will l=w+3 ( this is the equation for finding the length)
second equation will be l×w=18
substituting the 1st equation into the second, we get w(w+3)=18
=w²+3w=18
=w²+3w-18=0
using the factorising method we get
w²+6w-3w-18=0
=w(w+6)-3(w+6)=0
=(w-3)(w+6)=0
w+6=0
w=-6
We can't take this answer because width cannot be negative.
w-3=0
w=3
this is the width. Hence the length will be
l=w+3
=3+3
=6
this is the length.
Hope this cleared your doubt.
