Abrahamking Abrahamking

11-09-2020
Mathematics

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Hi help me please I don't know how to do it "using the formula evaluate (87)^2"

Hi help me please I dont know how to do it using the formula evaluate 872 class=

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Hrishii Hrishii

11-09-2020

Answer:

7,569

Step-by-step explanation:

[tex](87)^{2} \\ = {(90 - 3)}^{2} \\ = {90}^{2} - 2 \times 90 \times 3 + {3}^{2} \\ = 8100 - 540 + 9 \\ = 8100 + 9 - 540 \\ = 8109 - 540 \\ = 7,569[/tex]

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