Question

I f a = 2, b = -2, find the value of:
i) a2 + b2
ii) a2 + ab + b2
iii) a2 - b2​

Answer 1

Answer:

$\large\bf\fcolorbox{black}{pink}{ \: i) \: 8}$

$\large\bf\fcolorbox{green}{lavender}{ii) 4}$

$\large\bf\fcolorbox{yellow}{lime}{iii) 0}$

Step-by-step explanation:

i) a²+b²

= (2)²+(-2)²

$= 4 + 4$

$= 8$

ii) a²+ab+b²

= (2)²+(2)(-2)+(-2)²

= 4-4+ 4

= 0+4

= 4

iii) a²-b²

= (2)²-(-2)²

$= (4)-(4)$

$= (0)$

$= 0$

Hope it helps you!