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3 years ago

7) 4b2 + 8b + 7 = 4 What the answer

Mathematics

2 answers:

Anit [1.1K]3 years ago

8 0

4b² + 8b + 3 = 0

4b² + 2b + 6b + 3 = 0

2b(2b + 1) + 3(2b + 1) = 0

(2b + 3)(2b + 1) = 0

b = -1/2 or b = -3/2

san4es73 [151]3 years ago

7 0

B= -1/2 or b= -3/2

1. Subtract 4 from both sides.
2. Factor left side of equation.
3. Set factors equal to 0.

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Solution:

Given that triangle has perimeter of 126 cm

Let the length of the shorter side of the triangle be "a"

The 2 longer sides are 3 times as long as the shortest side

So length of 2 longer sides = 3(length of the shorter side)

length of 2 longer sides = 3a

The perimeter of triangle is given as:

perimeter of triangle = length of the shorter side + length of 2 longer sides

perimeter of triangle = a + 3a + 3a

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