25. Simplify the following expression.
Question 25 please
2 answers:
Answer:
3 -√5
Step-by-step explanation:
(√5 + 1) / (2 + √5)
Multiply top and bottom of the fraction by the conjugate of 2 + √5 which is 2 - √5.
By doing this we rationalise the denominator:
= (√5 + 1 ) * ( 2 - √5) / (2 + √5)(2 - √5)
= (√5 + 1 ) * ( 2 - √5)/ (4 - 2√5 + 2√5 - 5)
= (2√5 - 5 + 2 - √5) / (4 - 5)
= (√5 - 3) / -1
= 3 -√5
You might be interested in
you showed no diagram or any picture / screenshot
Answer:Complete the following sentence using the correct term.
14 is a ________ of 7 and 14.
Step-by-step explanation:
Answer: 12 miles
Step-by-step explanation: Stright from her house to luke is 5 miles back ti brianna is 4 miles and back home is 3 miles all together 5+4+3=12
They are called like terms
4 - 2/3x = -7 would be the equation to represent this.
