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Question Number 95469 by 6532 last updated on 25/May/20

(9b^2 −25)  why is this inside the bracket as it is a diffetence of two squares?

$$\left(\mathrm{9b}^{\mathrm{2}} −\mathrm{25}\right) \\ $$$$\mathrm{why}\:\mathrm{is}\:\mathrm{this}\:\mathrm{inside}\:\mathrm{the}\:\mathrm{bracket}\:\mathrm{as}\:\mathrm{it}\:\mathrm{is}\:\mathrm{a}\:\mathrm{diffetence}\:\mathrm{of}\:\mathrm{two}\:\mathrm{squares}? \\ $$

Commented by PRITHWISH SEN 2 last updated on 25/May/20

(3b−5)(3b+5)

$$\left(\mathrm{3b}−\mathrm{5}\right)\left(\mathrm{3b}+\mathrm{5}\right) \\ $$

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