7.5 Solving square root and other radical equations.

7.5

Solving square root and other radical equations

Solving square root equations

• Get the square root by itself before you do anything else.

• Square both sides and then solve

Solve

7952 x

Solve

369423 x

Solve

133144 x

Practice Problems

2/6: #7 pg 394 1-6, do 65-74 as review

7.5 Day 2

Solving radical equations

• Get the radical by itself• Raise each side to the reciprocal power• Remember rules for absolute values

evenismwhenxx mn

nm

)(

Solve

252 32x

Solve

54)3(2 23

x

Practice Problems

2/7: #8 pg 394 7-12

7.5 Day 3

• Extraneous solutions• Solving when we have multiple roots

Solve

xx 47

Solve

51 xx

Solving equations with 2 roots/rational exponents

• Get one on each side of the equation• Determine which power to take each side

too• Simplify and check your solutions

Solve021694 xx

Solve0)43()12( 25.5. xx

Practice Problems

2/6: #9 pg 394 15-29 odd, 34-42 even