SOLUTION: Can someone help me on this problem? I need to evaluate the following expression: [(2 + 3)^2 - 4 x 5] + 7 Thanks, Sher

Algebra ->  Expressions -> SOLUTION: Can someone help me on this problem? I need to evaluate the following expression: [(2 + 3)^2 - 4 x 5] + 7 Thanks, Sher      Log On


   

Question 49438: Can someone help me on this problem?
I need to evaluate the following expression:
[(2 + 3)^2 - 4 x 5] + 7
Thanks,
Sher
Found 3 solutions by stanbon, Osran_Shri, pwac:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
[(2 + 3)^2 - 4 x 5] + 7
5^2-20+7
25-20+7
12
Cheers,
Stan H.

Answer by Osran_Shri(18) About Me  (Show Source):
You can put this solution on YOUR website!
[(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


Answer by pwac(253) About Me  (Show Source):
You can put this solution on YOUR website!
[(2+3)^2-4x5]+7.Deal with multiplication inside bracket first:
[(2+3)^2-20]+7. Now parenthese
[5^2 - 20]+ 7. ( 5^2 = 5 x 5 = 25)
[25 - 20] + 7
5 + 7
12
Pete