# EVALUATE THE FOLLOWING?

Evaluate 25/√40-√80 , given that √5 = 2.236 and √10 = 3.162

Relevance
• 8 years ago

First simplify: √40 = √(10 * 4) = 2√10

(I square rooted the 4 inside the √ which gives 2 in front of the √)

Therefore, 2 * 3.162 = 6.324 (the value of 2 * √10)

Again, √80= √(16 * 5) = 4√5 (by square rooting 16)

Therefore, 4 * 2.236 = 8.944

(25/6.324) -8.944 = -4.991

Sorry missed the divide sign earlier!

• 8 years ago

√40 = 2 √10 = 2*3.162 = 6.324

√80 = 4 √5 = 4*2.236 = 8.944

if its ..

25/(√40-√80) ...then ans is 25 / -2.62 = -9.543

or

if its..

25/√40 - √80 ...then ans is 3.95 - 8.944 = - 4.991 !!