Question

Number in the unit place of a two digit number is 3 more than that in the tenth place number.product of the number and the sum of its digits is 70 .what is the number​

Answer 1

Answer:

number at unit place is -7 or 10

number at tenth place is -10 or 7

Step-by-step explanation:

Given data :-

no. at tenth place = x

no. at unit place = x+3

on multipling both ans is 70

Calculation :-

x (x+3) = 70

x^2 + 3x -70 = 0

on solving this quadratic equation we get

2 roots or 2 solutions

x = 7 and x = -10

here

we get tenth place value 7 or - 10

on adding 3 we get

units place value 10 or -7

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Answer 2

Answer:

7 or 10

Step-by-step explanation:

the no.=x, x+3

two digit number =11x+3

(2x + 3) (11x + 3)=70

22x^2+39x -61=0

x=1

8=14