Question

if x=2/3and x=-3 are the roots of quadratic equation ax² +7x+b =0,find the values of a and b​

Answer 1

Answer:

A=3

B=-6

Step-by-step explanation:

For the first Braket

$3x = 2$

$3x - 2 = 0$

$(3x - 2)$

For the second bracket

$x = - 3$

$x + 3 = 0$

$(x + 3)$

This gives us

$(3x - 2)(x + 3) = 0$

If we factor these brackets we get

$3x {}^{2} + 9x - 2x - 6 = 0$

Which can be simplified to

$3x {}^{2} + 7x - 6 = 0$

We can see that a=3 and b=-6 from the original

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