Question

a. Simplify: (√3+√7) (√3-√7) b. Add 2√2+ 5√3 and √2 – 3√3.​

Answer 1

a. (√3 + √7 ) ×( √3 - √7 ) = (√3)² - (√7)²

= 3 - 7

= -4

b. 2√2 + 5√3 + √2 - 3√3 = 2√2 +√2 +5√3 - 3√3

= 3√2 + 2√3

= √9√2 + √4√3

= √18 + √12

= √6( √3 + √2 )