a + b = 3 and ab = 2 the value of a² - b² is (a) +- (b) +- 1 (d) 4
Answers
Answered by
1
Answer:
c option is not seen
Step-by-step explanation:
please write the c option first
Answered by
0
Answer:
answer is 3
Step-by-step explanation:
a+b= 3
b= 3-a
ab= 2
putting the value of b
a(3-a) = 2
3a-a²= 2
a²-3a +2= 0
a²-2a-a+2=0
a(and) -(a-2)
(a-2) (a-1)
a= 2 or a= 1 [you can take any value ]
a+b= 3
b= 3-2= 1
a²-b²= (a+b) (a-b) [given a + b = 3]
= 3(2-1)
= 3
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