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23.If 3x-7y = 10 and xy = -1 then the value of 9x2 + 49y2 is |
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Answer» 58 is correct answer of this question may be 58 is the correctanswer 9x^2+49y^2=(3x-7y)^2+2xy=(10)^2+(-1*2)=100-2=98 9x^2+49y^2(3x-7y)^2+2.3x.7y(10)^2+(-1*42)100-4258 58 is the correct answer of your question 58 is correct answer or what 58 is correct answer according to your question 58 is correct answer 58 is a right answer by rule |
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