Which step has the error? Describe what the error is \frac{5r^{2}}{2r+3}

preprekomW

preprekomW

Answered question

2021-10-10

Which step has the error? Describe what the error is
5r22r+3÷4r+610
Step 1: 5r22r+3×2(2r+3)10
Step 2: 5r21×210=10r210
Step 3: 10r210=r2

Answer & Explanation

Pohanginah

Pohanginah

Skilled2021-10-11Added 96 answers

Step 1
Right solution is
5r22r+3÷4r+610
step 1: 5r22r+3×102(2r+3)
step 2: 50r22(2r+3)2
Hence it is clear from the above the error in step 1 (answer)
Explanation:
Rule: ab÷dc=ab×cd when two fractions are divided, we turns the second fraction in reciprocal form and the division sign changes into multiplication.

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