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 ▸Lily goes on a car journey. For the first 30 min. her average speed is 40 mph. She then stops for 15 min. She then completes the journey at an average speed of 60 mph. The total journey time is 1 h. What is her overall average speed?
What is the difference between a parametric equation and a general equation?
How do you find the tangent of an angle in a right-angled triangle?
find the second degree equation that passes through the points: (0,1) (2,2) (1,0)