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Rationalize the denominator in each expression. That is, rewrite the expression so that there is a rational expression in the denominator a)((x-9)/√(x-9))b)((x-9)/(√x+3))

Respuesta :

Answer:

explanations: we multiply with a rational surd

(x-9)*√(x+9)/(√(x-9)*√(x+9)

=(x-9)√(x+9)/

[tex]x {}^{2} - 9[/tex]

B.( x-9)/√x+3 =( x-9)*(√x-3)/(√x+3)*(√x-3)

= (x-9)*(√x-3)/x-9

=√x-3

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