Question

If x = -3 is a solution of 3x ( 2x - 5 ) + 7 then the value of x is *​

Answer 1

Step-by-step explanation:

$given \: x = - 3 \\ 3x(2x - 5) + 7 \\6x {}^{2} - 15x + 7 \\ 6( - 3) {}^{2} - 15( - 3) + 7 \\ 6 \times9 + 45 + 7 \\ 54 + 45 + 7 \\ 99 + 7 \\ 106$

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Answer 2

Step-by-step explanation:

we know that x=-3

according to the problem

3x(2x-5)+7

=3(-3){2(-3)-5}+7

=-9(-6-5)+7

=-9(-11)+7

=99+7

=106.

106 is the right answer.