Answer please will matk u as brilliant

Mathematics

2 answers:

eimsori [14]2 years ago

8 0

B) obtuse triangle
Hope this helps!

Korolek [52]2 years ago

7 0

Answer:

∠ CAB is an acute angle

Step-by-step explanation:

The sum of the 3 angles in the triangle = 180° , then

∠ CAB + 100° + 25° = 180°

∠ CAB + 125° = 180° ( subtract 125° from both sides )

∠ CAB = 55°

Since ∠ CAB < 90° then it is an acute angle

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Show that 2x +1 is a factor of 2x3 +5x2+4x+1 and factories completely

larisa [96]

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$\text{Now,}\\\\f(x) = 2x^3 +5x^2 +4x +1 \\\\~~~~~~=2x^3+x^2 +2x^2 +2x +2x+1\\\\~~~~~~=x^2(2x+1) +2x(2x+1) + (2x+1)\\\\~~~~~~=(2x+1)(x^2 +2x +1)\\\\~~~~~~=(2x+1)(x+1)^2$