Question

4. If a + b2 = 10 and ab = 3; find :
(ii) a + b
(1) a-b​

Answer 1

Answer:

a+b = 4

a-b = 2

Step-by-step explanation:

a= 1 and b =3

Answer 2

Answer:

(ii) a + b = 4

(1) a-b = 4

Step-by-step explanation:

a² + b² = 10 and ab =3

(a + b)² = a² + b² + 2ab

=>(a + b)² = 10 + 2(3)

=>(a + b)² = 16

=>a + b   =  4(root 16)

(a - b)² = a² + b² - 2ab

=>(a - b)² = 10 - 2(3)

=>(a - b)² = 16

=>a - b = 4(root 16)

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