Answer:
-2[tex]y^{4}[/tex] - 5y² + 42
Step-by-step explanation:
Each term in the second factor is multiplied by each term in the first factor, that is
y²(- 2y² + 7) + 6(- 2y² + 7) ← distribute both parenthesis
= - 2[tex]y^{4}[/tex] + 7y² - 12y² + 42 ← collect like terms
= - 2[tex]y^{4}[/tex] - 5y² + 42 ← in standard form
[ standard form means the first term has the largest exponent of the variable, followed by other terms in descending powers of the variable. ]
