Answer:
78
Step-by-step explanation:
Replace x with -3:
6(2x(-3)^2 - 5)
We will solve this using BIDMAS, or another alternative.
B - Brackets. First we solve what is in the brackets:
2x(-3)^2
I - Indices:
(-3)^2
This means -3 × -3.
Two negatives multiplied become a positive. Therefore -3 × -3 = 9
Substitute 9 into the equation.
6(2(9) - 5)
2(9) - 5
D/M - Division/Multiplication:
A number next to a bracket represents multiplication.
2(9) - 5 =
2 × 9 - 5
A/S - Addition/Subtraction:
18 - 5
13
Now substitute 13 into the original equation:
Now we have finished with the brackets, we do BIDMAS again for everything outside of the brackets.
D/M - Division/Multiplication:
A number next to a bracket represents multiplication.
6(13) =
6 × 13 = 78
