ans: 1150
hope it helps !
Answer:
x=3, -1/7
Step-by-step explanation:
7x^2-20x-3=0
Factor.
(x-3)(7x+1)=0
x-3=0 ⇒ x=3
7x+1=0 ⇒7x=-1 ⇒x= -1/7
The missing number is 15
The lengths of all sides of the patio are 15, 15, 9, 9.
Pls thank if this helped!! :)