Can someone check this for me. The square of a number increased by 5 times the number is equal to 176. Find the number.
The number is 151
x+5^2=176
x=151

Question

Can someone check this for me. The square of a number increased by 5 times the number is equal to 176. Find the number.
The number is 151
x+5^2=176
x=151

welshfella · Answer

x^2 + 5x = 176

anonymous · Answer

will x be the same on both sides

welshfella · Answer

not sure what you mean
you need to solve the equation

x^2 + 5x - 176 = 0

this is called a quadratic equation
have you seen these before?

anonymous · Answer

yes i have i have trouble remembering #s can you give me a min

anonymous · Answer

x=11

welshfella · Answer

yes   thats one answer   whats the other?

anonymous · Answer

-16

anonymous · Answer

x=-32/2

welshfella · Answer

yes thats correct - i got in a tangle then

anonymous · Answer

a what?

welshfella · Answer

I had a brainstorm!

anonymous · Answer

The square of a number increased by 5 times the number is equal to 176 is -16

anonymous · Answer

I can only write one answer

welshfella · Answer

well write 11 then

anonymous · Answer

is this another brainstorm??? :)

welshfella · Answer

no lol

anonymous · Answer

ok thanks so my final answer is 11 Thank you

welshfella · Answer

11 fits perfectly:-

11^2 + 5*11 = 121 + 55 = 176

anonymous · Answer

I only have about 10 more review pages to go before my exam. omgosh :(

welshfella · Answer

good luck

anonymous · Answer

thanks:)

welshfella · Answer

yw  
and thank you - i get 75 for problem solving so i'm promoted to Mentor!!

anonymous · Answer

WooHoo so your prize is you get to correct my questions all night. :)

welshfella · Answer

lol!!

welshfella · Answer

sorry I have to go -  Its pretty late here in Europe