Question

10.5 × 10.5 - 15 × 10.5 + 7.5 × 7.5 divided by 10.5 -7.5

Answer 1

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Answer 2

Answer:

Step-by-step explanation:

Let a=10.5b=7.5

(10.5×10.5-15×10.5+7.5×7.5)

/(10.5-7.5)

=(a^2-2ab+b^2)/(a-b)

=(a-b)^2/(a-b)

=a-b

=10.5-7.5

=3