Question

If a=2, b= -1and C= 4 find a2 + b2 + c2 - bc – ca– ab

Answer 1

Answer

8

Explanation

equation will be

a=2 then

a2=2x2 =4

b=-1 then

b2=-1x2 =-2

c=4

then c2=4x2=8

bc=-1x4

ca=4x2

ab=2x-1

so, whole equation is

(4+-2+8-(-4)-8-(-2)=8

THIS IS NOT SO LONG READ IT CAREFULLY THIS IS EASY OK HOPE IT HELPS YOU .