Question

9. Find the square of (8+.5under root 3)​

Answer 1

${(8 + 5 \sqrt{3}) }^{2}$

Using the identity :

${(x + y)}^{2} = {x}^{2} + {y}^{2} + 2xy$

$= {8}^{2} + {(5 \sqrt{3} )}^{2} + 2( 8 )\: (5 \sqrt{3} )$

$= 64 + 75 + 80 \sqrt{3}$

Answer 2

Answer:

Step-by-step explanation:

(8+ 5√3)^2 = 8^2 + (5√3)^2 + 2(8)(5√3)

64+ (25×3) + 80√3

64+ 75 + 80√3

139+ 80√3

This is by Identity

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