Question

Choose the correct simplification of the expression -5x2(4x - 6x2 - 3).

30x4 - 20x3 + 15x2
-11x4 - x3 - 8x2
-30x4 + 20x3 - 15x2
30x4 + 20x3 + 15x2

Answer 1

multiply everything which is inside the parentheses by outside term
and when you multiply same bases you should add their exponents

Answer 2

also pay attention to the signs

Answer 3

i still don't understand :(

Answer 4

example
a(b+c)
multiply b and c by outside term which is a
a times b + a times c
=ab+ac

Answer 5

multiply all 3 terms
4x,-6x^2 ,-3 by -5x^2

Answer 6

Will it end up negative or positve?

Answer 7

you have to multiply 2 terms if one of them is negative then answer will be negative
negative times negative =positive
negative times positive = negative

Answer 8

-5x^2 times 4x =??

Answer 9

so this one will end up negative because the outside term is negative?

Answer 10

Cant you not combine them because one has an exponent and the other doesn't

Answer 11

you will get 3 terms and all of them end up with different signs bec it also depends on inside terms

Answer 12

yes right in order to combine them you u should have same variable with same exponents
x^2 +x you can't combine these both terms bec both hve different exponents

Answer 13

-5x^2 times 4x = (-5 times 4)(X^2 times x)
add exponents so it should be like this x^{2+1}

Answer 14

I'm so confused