Question

Multiply: (3x + 7)(5x2 − 3x + 6)

Answer 1

Answer:

${15x}^{3} + {26x}^{2} - 3x + 42$

Step-by-step explanation:

$(3x + 7)( {5x}^{2} - 3x + 6) \\ = {5x}^{2} (3x + 7) - 3x(3x + 7) + 6(3x + 7) \\ = {15x}^{3} + {35x}^{2} - {9x}^{2} - 21x + 18x +42 \\ = {15x}^{3} + {26x}^{2} - 3x + 42 \: \: \: \: \: \: \: \: \: \: \: \: \: ans.$