Find the square of rhe leg b of this right triangle a=2b, c=10

a^2+b^2=c^2

where c=25 m. and a=2b-10 m.

substitute

(2b-10)^2+b^2=25^2

4b^2-40b+100+b^2=625

5b^2-40b+100=625

divide both sides by 5

b^2-8b+20=125

subtract 20 from both sides

b^2-8b=105

complete the square

take half of 8 and square it=16

i hope this helps =3

step-by-step explanation:

and 90% of people marry there 7th grade love. since u have read this, u will be told good news 2night. if u don't pass this on nine comments ur worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of ur life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u

read more on -