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1 year ago

A girl's age in 12 years' time is the square of her present age. Find her present age.

Mathematics

2 answers:

SIZIF [17.4K]1 year ago

4 0

Answer:

Step-by-step explanation:

Let x represent her present age. The given relation is ...

x +12 = x^2

Putting this in standard form, we can factor it:

x^2 -x -12 = 0

(x -4)(x +3) = 0

Solutions to this quadratic are x = 4, x = -3. The -3 solution is extraneous in this context.

The girl's present age is 4.

harkovskaia [24]1 year ago

3 0

Answer: her present age is 4

Step-by-step explanation:

Proof: 4+12=16

Square root 4 is 16

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