Now find the product (2+ sqrt 5)(2- sqrt 5). The product is ...
the answer is -1

the answer is -1

Step-by-step explanation:

(2+√5)(2-√5)

4-2√5+2√5-5

4-5=-1

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.