the sum of a whole number and twice the square of the number is 10 ,find the number
* show the solving steps *
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the sum of a whole number and twice the square of the number is 10 ,find the number
* show the solving steps *
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Answer:
numbers are 3 and 1
Step-by-step explanation:
square of 3 is 9 and by adding 1 is 10
Verified answer
Step-by-step explanation:
Let, that number be x
ATQ, x + 2x² = 10
→ 2x²+x-10 = 0
→ 2x²-4x+5x-10 = 0
→ 2x(x-2)+5(x-2) = 0
→ (2x+5)(x-2) = 0
→ (2x+5) = 0 →(x-2) = 0
→ x = -5/2 → x = 2
As it is asking about whole number so -5/2 isn't the answer.
Hece, the whole number is 2