Question

What would be the denominator after rationalizing 7/(5√3 – 5√2)? *
a) 19
b) 20
c) 25
d) None of these

Answer 1

Answer:

denominator after rationalizing is 25

Step-by-step explanation:

option c

Answer 2

Answer:

(D) 5, NONE OF THESE

Step-by-step explanation:

7/(5√3 – 5√2) = 7/5(√3-√2)

= 7/5(√3-√2) × (√3+√2)/(√3+√2)

=7/5 × (√3+√2) / (√3-√2)(√3+√2)

= 7/5 × (√3+√2) / (√3)²- (√2)²

= 7/5 × (√3+√2) / 3-2

= 7/5 × (√3+√2) / 1

= 7/5×(√3+√2)

HENCE THE DENOMINATOR IS 5.

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