(x + 5) (x^2 - 3x)
Follow the formula (a + b) (c + d)
Multiply a with c
Multiply a with d
Multiply b with c
Multiply b with d
You should get something like this: ac + ad + bc + bd
Step 1 : Multiply the first term of the first bracket to the first term of the other bracket
Step 2 : Then multiply the first term of the first bracket to the last term of the second bracket.
Step 3 : Now come to the second term of the first bracket, multiply the second term with the first term of the second bracket.
Step 4 : Finally, multiply the last term of the first bracket with the last term of the second bracket.
Step 5: Adding all the numbers we got, we get the final answer.
ANSWER: x^3 + 2x^2 - 15x