Simplify (3 + √2)(3 − √2).
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0
(3+√2)(3-√2)
therefore,
(a+b)(a-b)= a²-b²
=(3)²-(√2)²
= 9-2
=7
Answered by
1
Answer:
applying formula (x+y) (x-y) = x^2 - y^2
x = 3 and y = √2
=> (3)^2 - ( √2 ) ^2
=> 9 - 2
=> 7
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