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Sagot :
Answer:
1) area = (x + 3)(2x + 3) ft²
2) 299 ft²
Step-by-step explanation:
Question 1
Area of a rectangle = width x length
Given:
- width = x + 3
- length = 2x + 3
⇒ area = (x + 3)(2x + 3) ft²
Question 2
If x = 10:
⇒ area = (10 + 3)(2(10) + 3)
= 13 · 23
= 299 ft²
#1
- New dimensions=x+3 and 2x+3ft
So
Area:-
- Length ×Breadth
- (x+3)(2x+3)
- x(2x+3)+3(2x+3)
- 2x^2+3x+6x+9
- 2x^2+9x+9ft^2
#2
Put x=10
- 2(10)^2+9(10)+9
- 2(100)+90+9
- 200+99
- 299ft^2
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