9. Mrs. Timbang bought a rectangular land shape with dimensions of (x + 5)cm and (x + 4)cm.
What will be the area of land that Mrs. Timbang bought?
a. x2 + 9x + 20 cm2
c. x2 + 9x - 20 cm2
b. x2 - 9x + 20 cm2
d. x2 - 9x - 20 cm?
What will be the area of land that Mrs. Timbang bought?
a. x2 + 9x + 20 cm2
c. x2 + 9x - 20 cm2
b. x2 - 9x + 20 cm2
d. x2 - 9x - 20 cm?
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Answer:
A
Step-by-step explanation:
( x + 5 ) ( x + 4 )
x × x = x²
x × 4 = 4x
5 × x = 5x
5 × 4 = 20
4x + 5x = 9x
x² + 9x + 20
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