Question

4. If a + b = 5 and ab = 2, find the value of
(a)
${a }^{2} + {b}^{2}$
question above may hai mate answer soon
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Answer 1

Answer:

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Step-by-step explanation:

$using \: \: identity \\ (a + b) {}^{2} = {a}^{2} + {b}^{2}+ 2ab \\ \\substituting \: \: values \\ (5) {}^{2} = {a}^{2} + {b}^{2} + 2(2) \\ 25 = {a}^{2} + {b}^{2} + 4 \\ 25 - 4 = {a}^{2} + {b}^{2} \\ 21 = {a}^{2} + {b}^{2}$

hence a^2 + b^2 = 21

Answer 2

Step-by-step explanation:

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4. If a + b = 5 and ab = 2, find the value of

(a)

${a }^{2} + {b}^{2}$

question above may hai mate answer soon