Answer:
Formula Of Vertex and Line of symmetry
Step-by-step explanation:
The axis of symmetry always passes through the vertex of the parabola . The x -coordinate of the vertex is the equation of the axis of symmetry of the parabola. For a quadratic function in standard form, y=ax2+bx+c , the axis of symmetry is a vertical line x=−b2a
Parabolas always have a lowest point (or a highest point, if the parabola is upside-down). This point, where the parabola changes direction, is called the "vertex"
Answer:
As Perimeter of rectangle =2(l+b)
Let original length & bredth of rectangle be L & B
⇒ 2(L−5+B−5)=26
⇒ 2(L+B−10)=26
⇒ 2(L+B)=46
⇒ L+B=23
B= 5,3
c=4,-1
a=2,1
this is the answer to part c
