if x=2/3 and -3 are the roots of eq. ax²+7x+b=0 find a and b. Math experts plz try to give answer in picture!!!
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4/9a+14/3+b=0
4a+9b=-42
9a-21+b=0
9a+b=21
81a+9b=189
77a=231
a=3
b=-6 explanation of second line is equal isng the denominator
4a+9b=-42
9a-21+b=0
9a+b=21
81a+9b=189
77a=231
a=3
b=-6 explanation of second line is equal isng the denominator
kartik338:
could you explain 2nd line
please see i hv answered u
bur i did not understand
u have to multiple each term by 9 of first equation u get second
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