Find the value of x. Round to the nearest tenth
A. 11.0
B. 8.1
C. 15.3
D. 24.5

x = 11.0

Step-by-step explanation:

b =√c2 - a2

=√132 - 6.88895043503172

=√121.54236190368

=11.02463

- 2 + 10x³ - 21x² + 19x - 4

step-by-step explanation:

each term in the second factor is multiplied by each term in the first factor

x²(- 2x² + 4x - 1) - 3x(- 2x² + 4x - 1) + 4(- 2x² + 4x - 1) ← distribute

= - 2 + 4x³ - x² + 6x³ - 12x² + 3x -8x² + 16x - 4

collect like terms

= - 2 + 10x³ - 21x² + 19x - 4 ← in standard form

d is correct

step-by-step explanation: