Find the value of a^2+4b^2+9c^2 if a+2b+3c=6 and 2ab+6bc+3ac=11 pls answer
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The square of expression with three terms has six terms.
Three of them comprises square, the rest comprises multiplication of 2 and each other.
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Now you can see what values you need to put into.
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Since expressions are denoted by =, you can use basics of equality to find out the value.
I won't find the value for you. I want to help somebody understand the question.
One can memorize all the formulas, but they won't be able to solve any questions. I hope it helps.
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