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Mathematics
Roselyn Johns
8 February, 19:41
Solve the equation √x+√ (x+3) = 3.
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Meredith Blackwell
8 February, 21:55
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The solution for this question is 1.
Step-by-step explanation:
Given that
√x+√ (x+3) = 3.
√x=3-√ (x+3) (a) simplify the equation
square equation (a)
(√x) ^2 = (3-√ (x+3)) ^2
we know that (a-b) ^2 = (a^2+b^2-2. a. b) and (√x) ^2=√x*√x=x. So solve equation a
(√x) ^2 = (3-√ (x+3)) ^2
x = (3) ^2 + (√ (x+3)) ^2-2*√x+3*3
x=9 + (x+3) - 6√x+3
x=9+x+3-6√x+3 simplify equation
x-x=9+3-6√x+3
0=12-6√x+3
6√x+3=12
√x+3=12/6
√x+3=2 (b)
square equation b
(√x+3) ^2=2^2
x+3=4
x=4-3
x=1
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