Question

If a = 1, b = -1 and c = 2, then the value of expression a2 + b2 + c2 is ​

Answer 1

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$\bf{{\underline{To~find}}:}$

• The value of $\sf{a^{2}+b^{2}+c^{2}}$ when $\sf{a=1,~b=-1~and~c=2}$

$\bf{{\underline{Solution}}:}$

$\sf {a}^{2} + {b}^{2} + {c}^{2} \: \: \: \\ \sf : \longmapsto (1)^{2} + {( - 1)}^{2} + {(2)}^{2} \\ \sf : \longmapsto 1 + ( - 1 \times - 1) + 4 \: \\ \sf : \longmapsto 1 + 1 + 4 \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \\ \sf : \longmapsto \blue{ \underline{ \boxed{ \bf 6}}} \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

Answer 2

Answer:

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If a = 1, b = -1 and c = 2, then the value of expression a² + b² + c² is 

Step-by-step explanation:

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To Find:

• The value of a²+b² +c²

when a = 1, b = –1 and c = 2

Solution:

⟼ a²+b²+c²

⟼ 1²+(−1)²+(2)²

⟼ 1 + (–1 x –1) + 4

⟼ 1 + 1+ 4

⟼ 6