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Solve the inequality |11x + 3| <= 0

The inequality 11x+30|11x + 3| \leq 0 has no solutions.

To understand why, we first recognize that the absolute value of any real number is always non-negative. Specifically, for any real number aa, it holds that a0|a| \geq 0. Consequently, this implies that 11x+30|11x + 3| \geq 0 for all xx in R\mathbb{R}.

Now, let’s consider the possibility of there being some xx in R\mathbb{R} such that 11x+30|11x + 3| \leq 0. According to the definition of absolute value, this condition can only be satisfied if 11x+3=011x + 3 = 0. Solving this equation for xx, we find:

11x+3=0    11x=3    x=311.11x + 3 = 0 \implies 11x = -3 \implies x = -\frac{3}{11}.

However, we need to check whether this value of xx satisfies the original inequality. Substituting x=311x = -\frac{3}{11} into the expression, we get:

11(311)+3=3+3=0=0.|11(-\frac{3}{11}) + 3| = |-3 + 3| = |0| = 0.

While this shows that 11x+3|11x + 3| equals 00, it does not satisfy the condition 11x+3<0|11x + 3| < 0 because 00 is not less than 00.

Thus, we conclude that there are no solutions to the inequality 11x+30|11x + 3| \leq 0. In summary, since the absolute value of any real number cannot be negative, the inequality 11x+30|11x + 3| \leq 0 has no solutions.

Answered by: Prof. Sophia Clark
A-Level Maths Tutor
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