Question

Is x = -4, a solution of the equation 2x2 + 5x - 12 = 0?
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Answer 1

Step-by-step explanation:

2(x)2+5(x)-12

if x=-4

2(-4)2+5(-4)-12

2(16)-20-12

32-32=0

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Answer 2

Heyaa☺

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Given,

x = -4

Equation =》 2x^2 + 5x -12 = O

Substituting X in equation.

=》2(-4)^2 + 5(-4) - 12 = 0

=》2(16) + (-20) -12 = 0

=》 32 - 20 -12 = 0

=》 12 -12 =0

=》 0 = 0

LHS = RHS.

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Hope you understood..✌