If a2 + 4a + x = (a + 2)2, find the value of x.

If a2 + 4a + x = (a + 2)2, find the value of x.

Answer :

It is given that

a2 + 4a + x = (a + 2)2

By expanding using formula

a2 + 4a + x = a2 + 22 + 2 × a × 2

By further calculation

a2 + 4a + x = a2 + 4 + 4a

So we get

x = a2 + 4 + 4a – a2 – 4a

x = 4

More Solutions:

Leave a Comment