Mathematics 4 ESO – Unit 4 EQUATIONS AND INEQUALITIES page 50 activity 57
a) Watch the video on “Solving radical equations” and answer:
- I) What is the first thing we have to isolate?
- II) Where do we lose some information? Why?
- III) Solve:
- 4 + √(2x+24) = 10
- √(x–1) – 5 = – 3
b) Watch the video on “Using the property of equality of powers to solve an equation with exponents” and answer:
- I) What is the “property of equality”?
- II) What is the “power of power rule”?
- III) When we have the same bases on both sides of the equation, what do we do?
- IV) Solve:
- i) 3^x = 9^(x+5)
- ii) 3^(2x–1) = 27
