2. There are 72 students present in a class. Find the number of boys present in the class, if
the number of girls present is the square of the number of boys present.
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Answer:
total students=72
let no. of boys=x
then no. of girls=x sq
A.T.Q,
x+x sq=72
x+x sq-72=0
x sq+x-72=0
S=1=9-8
P= -72=9×-8
x sq+9x-8x-72
x[x+9]-8[x+9]
[x-8] [x+9]
x=8
x≠9
therefore,
no. of boys =x =8
no. of girls=x sq=8 sq=64
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