shreeshaa099
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(2+1/2) (2^2-1+1/4) find the expression in the form of cubes and differences of two terms.​

Sagot :

mhanifa

Answer:

Consider the following identity:

  • a³ - b³ = (a + b)(a² - ab + b²)

Let a = 2, b = 1/2

  • (2 + 1/2)(2² - 2*1/2 + 1/2²) =
  • 2³ - (1/2)³ =
  • 8 - 1/8

Use the algebraic identity given below

[tex]\boxed{\sf a^3-b^3=(a+b)(a^2-ab+b^2)}[/tex]

[tex]\\ \sf\longmapsto (2+\dfrac{1}{2})(2^2-1+\dfrac{1}{4})[/tex]

[tex]\\ \sf\longmapsto (2+\dfrac{1}{2})(2^2-2\times \dfrac{1}{2}+\dfrac{1}{2}^2)[/tex]

  • Here a =2 and b=1/2

[tex]\\ \sf\longmapsto 2^3-\dfrac{1}{2}^3[/tex]

[tex]\\ \sf\longmapsto 8-\dfrac{1}{8}[/tex]

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