![maya611](/avatars/30869.jpg)
maya611
06.11.2020 •
Mathematics
Made a GOOGLE MEET im 13 and female :) PASS: juicytree
Solved
Show answers
More tips
Answers on questions: Mathematics
- M Mathematics What is 4/5+(−7/5)? (it s in fraction form)...
- M Mathematics If -19 of a sperm what is the number...
- M Mathematics Which measurement cannot be the circumference of a circle and why? 45 cm 62.83 cm 47.12 cm squared...
- P Physics The electric field was defined as e⃗ =f⃗ onq/q, and we used this to find the electric field of a point charge. using analogous reasoning, what is the gravitational field...
- H History I need help on history lol...
- W World Languages Shella Is Deaf and works in a dental office as a dental hygienist. She cleans teeth and performs other routine checkups. There are three other employees who work in the dental...
- M Mathematics What is the distance between (7,3) and (7,-5)...
Ответ:
here you go
Step-by-step explanation:
Ответ:
√(4x+13) = 2x-1(1)
note : if ( a=b) so (a² = b²)
if : (√(4x+13) )²= (2x-1)² so : 4x+13 = 4x²-4x+1
4x²-8x-12 = 0
x²-2x-3 = 0
(x+1)(x-3) = 0
x+1 = 0 or x-3=0
x= -1 or x=3
if : x= -1 : √(4(-1)+13) = 2(-1)-1
√9 =-3 but √9 =3
3 = -3 impossible ( -1 is not solution of equation (1)
if : x = 3 : √(4(3)+13) = 2(3)-1
5 = 5 ( right) conclusion : one solution : 3