Work out the value of 2a^2 + b^3 when a = 5 and b = –3
To work out the values you need to sub in a and b into the equation, giving you: 2(5)2 + (-3)3 From this we use the rules of BODMAS to first complete the orders and obtain: 2*25 + (-27). Again using BODMAS we multiply 2 by 25: 50 + (-27). Lastly we subtract 27 from 50 as a + and negative together gives a negative: 50 - 27 = 23.
KM
Related Maths GCSE answers
All answers ▸A class of 10 students all complete a maths exam. Their marks are as follows: 67, 82, 48, 36, 55, 95, 19, 49, 62 and 73. Find the mean, median and range.
Solve 4x^2 - 3x - 4 = 0
How do you calculate a number to the power of a fraction? (8^2/3)
Which of these shapes has the most sides? Hexagon, Octagon, Rhombus, Trapezium