6.1 ANSWER TEST YOURSELF in-depth path 

Answer test yourself 

Calculate

(2--8) + (-9)2 - 7 + (√3)+ √(10+6) 

= (2 + 8) + (-9 -9) - 7 + (√3 . √3)+ √16 

= 10 + 81 - 7 + 3 + 4 

= 91