Question

if a= -1 and b= -2 , then find the value of →
a2+2ab+b2 ​

Answer 1

Step-by-step explanation:

${a}^{2} + 2ab + {b}^{2}$

Plug the known values and then simplify :

= ${( - 1)}^{2} + 2 \times ( - 1) \times ( - 2) + ( - 2) ^{2}$

= $1 + ( - 2) \times ( - 2) + 4$

= $1 + 4 + 4$

=$\boxed{ \large{ \sf{9}}}$

Hope this helps !

Answer 2

Answer:

a^2+b^2+2ab=(a+b)^2

then

(a+b)^2=(-1+(-2))^2

-3^2=-3.-3

9

9is the answer