Question 49438
[(2 + 3)^2 - 4 x 5] + 7 --- Equation-1

Please find below step by step solution:

(2+3)^2 is similar to (a+b)^2 = a^2 + b^2 + 2ab  Therefore,

2^2+3^2+2*2*3 = 4+9+12 = 25 Substitute this value in Equation-1 above as below,

[25 - 20] + 7 = 5 + 7 = 12

Answer is : [(2 + 3)^2 - 4 x 5] + 7 = 12