Question

$(5y + 2z) {}^{2}$
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Answer 1

$(5y + 2z) {}^{2}$

$(a+b) {}^{2}$=a²+b²+2ab

$(5y + 2z) {}^{2}$

=(5y)²+(2z)²+2•5y•2z

=25y²+4z²+20yz

Answer 2

Answer:

25y²+20yz+4z²

Step-by-step explanation:

(5y+2z)²

(a+b)2=a²+2ab+b²

=(5y)²+2(5y)(2z)+(2z)²

=25y²+20yz+4z²

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