1. suppose that two times the square of a number equals 50. What is the number?
2. if the area of the square is (a^2+8a+16) cm^2, what is the measure of its side?
2. if the area of the square is (a^2+8a+16) cm^2, what is the measure of its side?
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Answer:
1. the number is ±5.
2. the measure of its side is a+4.
Step-by-step explanation:
1. 2x²=50
2x²/2=50/2
x²=25
√x²=±√25
x=±5
2. A=s² ---formula of square
given:
A=( a²+8a+16) cm²
substitute the given sa formula
a²+8a+16= s²
√(a²+8a+16)= √s²
√(a+4)²= s
a+4=s
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