Question

a-b =2 ,ab= 15 value of a^3 -b^3 ... question 7​

Answer 1

ans=98

MARK BRAINLIEST.

Answer 2

a^3 -b^3=(a-b)(a^2+b^2+ab)..eq1

now

a-b=2 and ab=15

squaring a-b we get

(a-b)^2=a^2+b^2 -2ab

4=a^2+b^2 -2×15

a^2+b^2=34

putting value of a^2+b^2 in (eq 1)

we get

a^3 -b^3=(2)(34+15)

=2×49

=98

answer is 98

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