Answer:
solve for area1: (a+9)(2a+5)
let A be the area
A1=(a+9)(2a+5)
A1=2a²+23a+45 sq. unit
solve for A2; (a+4)(a+4)
A2=(a+4)²
A2=a²+8a+16 sq. unit
solve for the area of the shaded region:
A=A1-A2
A=(2a²+23a+45)-(a²+8a+16)
A=a²+15a+29
the answer is a²+15a+29sq.units.
Step-by-step explanation:
