Question

If ab = 5 , a – b = 4 then find the value of a³ + b³​

Answer 1

Answer:

Hey mate

your answer is as follows

Step-by-step explanation:

ATQ

a*b = 5

a-b = 4

The value of a is 5

The value of b is 1

The value of a^3 is 125

The value of b^3 is 1

The value of a ^3 + b^3 is 126

Let's check

5*1 = 1

5-1 =4

Hence our answer is correct

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Answer 2

Answer:

-126

Step-by-step explanation:

ab= 5

a= b/5 ____eq 1

a= -5/5 (from eq. 2)

a= -1

a-b = 4

b/5 -b = 4 (from eq. 1)

-4b/5 = 4

b = 4 × -5/4

b = -5____eq 2

ATQ:

a³ + b³

= (-1)³ + (-5)³

= -1 -125

= -126