Question

simplify 454*441-454*21/(877)^2-423^2

Answer 1

Hi ,

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We know the algebraic identity

a² - b² = ( a + b ) ( a - b )

And

Distributive property ,

a × b + a × c= a ( b + c )

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Now ,

(454 × 441 - 454 × 21 )/(877² - 423² )

= [ 454(441-21 ) ]/[(877+423)(877-423)

= ( 454 × 420 )/(1300 × 454 )

= 420 / 1300

= 42 / 130

= 21/65

I hope this helps you.

:)

Answer 2

454×441-454×21/(877)²-(423)²
454(441-21)/(877+423)(877-423)
454×420/1300×454
=420/1300
42/130
21/65