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LICEJUICELEducation+Class- 10th1. If x = 2/3 and x = -3 are the roots of the equation ax2 + 7x + b = 0, find the values of a and b.2. Solve the following quadratic equations by factiruzatuib nethod:. (1, +*+1 = 34, x = 0,x = -1x+1 X 151.-L. Clarina undratic equations by factorization |
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Answer» It is for 2nd question 1)ax^2+7x+b=0x=2/3a(2/3)^2+7(2/3)+b=04a/9+14/3+b=04a+9b+42/3=04a+9b+42=0-----(1)ax^2+7x+b=0x= -3a(-3)^2+7(-3)+b=09a+b=21----(2)×94a+9b= -42----(1)81a+9b= 1894a+9b= -42by substrates 77a= 231a=231/77=3putting the value of a in eq24a+b=214×3+b=21b= 21-12=9 |
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