I came across a question like this on one of my tests:
What is the value of the equation:
2x^2 - 2.4x - 1.7 where x = 0.7
a) -1.42
b) -2.40
c) -0.40
d) -1.70
e) -2.20
Now, although the question is simple, i was not able to solve it correctly due to time constraints. After substituting the value of x in the equation, the multiplication becomes very complex. Is there a simple way of solving this problem? i tried the method of approximation but that didnt work for me!
Any help will be appreciated since I am really struggling with time in the maths section
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Thanks everyone!
Vini