Question

4. Sum of the three sides of a triangle is (9x2 - 2x
+ y) units. If the two sides are given by 5x2 +
16x - 7 and 15x + 12, then find the third side of
the triangle.​

Answer 1

(9x2-2x+y) - (5x2+16x-7) + (15x+12)

= 4x2-18x+y-15x+119

= 4x2-33x+y- 5

The third side of the triangle is 4x2-33x+y-5

Thanks

Answer 2

Step-by-step explanation:

Sum of all the sides=9x²-2x+y

we are given the two sides

Let the third side be A

(5x²+16x-7)+(15x+12)+A=9x²-2x+y

5x²+31x+5+A=9x²-2x+y

A=4x²-33x+y-5