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VLD [36.1K]
2 years ago
13

Which of the following is perfect square trinomial. Ive asked 4 times. Please Help. Will give brainlilest

Mathematics
1 answer:
Nutka1998 [239]2 years ago
6 0

Answer:

D

Step-by-step explanation:

a perfect square trinomial is

a^2x^2\pm2(ab)xy+b^2y^2

factorized is

(ax\pm by)^2

so as you can see option A and B can't be, because they have -49y^2 and it has to be plus

so the other options are C and D

in the trinomial a=4 and b=\pm 7

the roots of a^2 and b^2

\pm2abxy=\pm2(4)(7)xy\\\\=\pm56xy

so it's option d with b=-7

16x^2-56xy+49y^2

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