Simplify:
4 + 15
+
4-15
4 - 85
4 + √5
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Answered by
0
Answer:
this is question of rationalisation
Answered by
2
Answer:
42/11
Step-by-step explanation:
4+√5/4-√5 +4-√5/4+√5
= 4+√5(4+√5) +4-√5(4-√5) /4^2-√5^2
=16+5+8√5+16+5-8√5/16-5
=42/11
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