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