Answer:
x^2+11x+30
Step-by-step explanation:
Since rectangles have the same length on opposite sides, The shaded area is just two congruent triangles.
A= 1/2bh
2A= 2(1/2(x+6)(x+5))
2A= (x+6)(x+5)
2A= x^2 +5x +6x+ 30
2A= x^2 +11x +30
Shaded area= x^2 +11x +30
