Question

The perimeter of a triangle is 9m2 − 2m + 8 and its two sides are 4m2 + 3m and

7m2 + 5m −12. Find the third side of the triangle.​

Answer 1

Step-by-step explanation:

Perimeter of a triangle is a + b + c

(side+base+side)

Here, Perimeter is 9m² 2n + 8 and two sides are 4m2 + 3n,

7m² + 5n 12

Let other side be x

Therefore,

perimeter = a + b + c

=> 9m² – 2n + 8 = 4m² + 3n + 7m² + 5n -12 + x = 9m² – 2n + 8 - 4m2 - 3n - 7m² – 5n + 12 = x

= -2m2 10n + 20 = x

Therefore,

the other side is -2m² – 10n + 20

REGARDS❤

Answer 2

Answer:

Perimeter of a triangle is a+b+c (side+base+side)

Here, Perimeter is 9m

2

−2n+8

and two sides are 4m

2

+3n , 7m

2

+5n−12

Let other side be x

Therefore,

perimeter=a+b+c

=>9m

2

−2n+8=4m

2

+3n+7m

2

+5n−12+x

=9m

2

−2n+8−4m

2

−3n−7m

2

−5n+12=x

=−2m

2

−10n+20=x

Therefore,

the other side is −2m

2

−10n+20

please mark as brainliest