Question

Using formulae, find the value of the following: (a - 2) (a - 2)​

Answer 1

Answer:

The formula to find the value of x in quadratic equation (ax

2

+bx+c) is given by

x=

2a

−b±

b

2

−4ac

Using the same formula we find the value of x in x

2

+7x+12.

Here, a=1,b=7,c=12

∴ x=

2×1

−7±

7

2

−4×1×12

⟹ x=

2

−7±

49−48

⟹ x=

2

−7±1

∴ x=

2

−7+1

=−3 or x=

2

−7−1

=−4

∴ x=−3 or x=−4

Answer 2

a2−a2=0

then the answer is 0