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How do you simplify #2sqrt98-4sqrt18#?

Answer 1

#2sqrt2#

factorise 98 and 18 #98= 2×7×7# #sqrt98=7sqrt2#

#18=3×3×2# #sqrt18=3sqrt3#

#2sqrt98=2×7sqrt2=14sqrt2#. #4sqrt18=4×3sqrt2=12sqrt2#. subtract; #14sqrt2-12sqrt2=2sqrt2#. #2sqrt2= 2.8284271247# Hope it helps

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Answer 2

Kennedy Adams

To simplify 2√98 - 4√18, we can first simplify the square roots of 98 and 18. The square root of 98 is 7√2, and the square root of 18 is 3√2.

Substituting these values back into the original expression, we have 2(7√2) - 4(3√2).

Simplifying further, we get 14√2 - 12√2.

Combining like terms, we have 2√2 as the simplified form of 2√98 - 4√18.

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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.