Find the easiest solution of chapter number system of ncert class 9th give me the best solution of the exercise 1.5 question number 2(3),(4) . How i solve this important question in a simplest method , please sir help me to solve this tricky question in a simple method.Simplify each of the following expressions:(iii) (√5+√2)2 ,(iv) (√5-√2)(√5+√2)
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Simplify each of the following expressions:(iii) (√5+√2)2 ,(iv) (√5-√2)(√5+√2) Q.2 (3),(4)
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(iii) (√5+√2)2
Solution:
(√5+√2)2 = √52+(2×√5×√2)+ √22
= 5+2×√10+2 = 7+2√10
(iv) (√5-√2)(√5+√2)
Solution:
(√5-√2)(√5+√2) = (√52-√22) = 5-2 = 3