What are two numbers which multiply to make #-9450# and add to make #-15# ?

Answer 1

#-105 xx 90 = -9450#

#-105 +90 = -15#

One number has to be positive and one has to be negative to give a negative product.

Factors which differ by #15# are close to the square root of a number. They will be about #7# bigger or smaller than the square root.

#sqrt 9450 =97.211...#

Try numbers less than #97#

#9450 div 95 = 99.47" "larr# does not work #9450 div 94 = 100.53" "larr# does not work #9450 div 90 = 105" "larr# These are the factors

#-105 xx 90 = -9450#

#-105 +90 = -15#

By signing up, you agree to our Terms of Service and Privacy Policy

Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.