x = √(9 × 16) = √144 = 12 cm
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Rewrite s = 4 + sqrt(s+2) as s-4 = sqrt(s+2)
Square both sides: s^2 - 8s + 16 = s + 2
combine like terms: s^2 - 9s + 14 = 0
Factor this: (s-7)(s-2)=0
Solve for s: s={7, 2}
Answer:
a = 9 I think
Step-by-step explanation:
I am still trying do b
