Ashton estimates the square root of 72 in the following way: √72= 2√36=2×6=12 a)explain why his reasoning is incorrect. b)estimate the square root of 72 to the nearest tenth without using your calculator. show your work.

8.5

Step-by-step explanation:

To find √72, we must factor 72, remembering that the factor 36 is a perfect square:

√72 = √2·√36, or 6√2.  Ashton failed to take the square root of the factor 2 of 72.

√72 = 6√2, and √2 is approx. 1.414.

Multiplying 1.414 by 6 results in 8.5, which is to the nearest tenth.

x^3-4x^2+3x-2/x^2+1

step-by-step explanation:

factor the numerator and denominator and cancel the common factors

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