Math Question
![Unit Test Active
\( 4 \quad 11 \quad 12 \quad 13 \quad 14 \quad 15 \quad 16 \quad 17 \quad 18 \quad 10 \quad 20 \quad \square \quad 10 \)
Which values of \( a \) and \( b \) make the following equation true?
\[
\left(5 x^{7} y^{2}\right)\left(-4 x^{4} y^{5}\right)=-20 x^{a} y^{b}
\]
\( a=11, b=7 \)
\( a=11, b=10 \)
\( a=28, b=7 \)
\( a=28, b=10 \)](https://d3hlidq5bf9vg0.cloudfront.net/app-server-student/2022/4/12/86ebe2aa-afe1-4505-af6e-20b5458f969d.png "Unit Test Active
\( 4 \quad 11 \quad 12 \quad 13 \quad 14 \quad 15 \quad 16 \quad 17 \quad 18 \quad 10 \quad 20 \quad \square \quad 10 \)
Which values of \( a \) and \( b \) make the following equation true?
\[
\left(5 x^{7} y^{2}\right)\left(-4 x^{4} y^{5}\right)=-20 x^{a} y^{b}
\]
\( a=11, b=7 \)
\( a=11, b=10 \)
\( a=28, b=7 \)
\( a=28, b=10 \)")
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