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Q: Is this trinomial a trinomial square x2 plus 14x plus 49?

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Yes because if x2-14x+49 then it is (x-7)(x-7) when factored

-12

x2 - 14x + 49 = (x - 7)2

-x2+14x=49

Yes.

(x2 + 14x + 49) = (x + 7)2

In a word, yes. Any simplified form that has 3 terms is a trinomial, but is often in the form ax2 +bx +c where a,b,c are real numbers.

2x2 + 21x + 49 = 2x2 +14x +7x + 49 = 2x(x + 7) + 7(x + 7) = (2x + 7)(x + 7)

49

49-apex

49

(x - 7) is.

x2 - 14x + 49(x - 7) (x - 7)

49 x2 + 14x = -7 x2 + 14x + 49 = 42 (x + 7)2 = 42 x = -7 ± √42

51.07142857142857

x=7

Yes because 25x2-70x+49 = (5x-7)(5x-7) when factored

48

4x2 + 28x + 49 = 4x2 + 14x + 14x + 49 = 2x(2x + 7) + 7(2x + 7) = (2x + 7)(2x + 7) or (2x + 7)2

2x2+21x+49 = (2x+7)(x+7)

35

(x-7) (x-7)

x2 - 14x = -49 ∴ x2 - 14x + 49 = 0 ∴ (x - 7)2 = 0 ∴ x = 7

(2x+7)(x+7)

Improved answer:5x2+14x+5 = 5-5x2+14x+5 = 0Solve by completing the square:(x+7)2+5 = 0(x+7)2+5-49 = 0(x+7)2 = 44x+7 = + or - the square root of 44x = -7 + or - the square root of 44