Question

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.

Answer 1

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