Question

Which expression is equivalent to

420d2 - 126d?

Answer 1

An equivalent expression is d(10d - 3)

Using the expression given for our Calculation:

• 420d² - 126d

We divide through by 42 ;

10d² - 3d

Now we factorize ;

d(10d - 3)

Hence. an equivalent expression is d(10d - 3)

Answer 2

42d(10d-3)

Explanation: