Question

What number should go in the blank to make this polynomial a perfect square?

x2 + 24x + _____

Type your answer as an integer, like this: 5

Answer 1

see
x^2 +2(12)x+ ..

so isn't 12^2 =144 missing to complete the square

Answer 2

the answer would be 144 because if (x+12)(x+12) when you distribute it or FOIL it is comes out as x^2+24x+144