Expand (2- 5y + 6z)^2

1.	Expand (2- 5y + 6z)^2
Answer» <html><body><p>-<a href="https://interviewquestions.tuteehub.com/tag/step-25533" style="font-weight:bold;" target="_blank" title="Click to know more about STEP">STEP</a> <a href="https://interviewquestions.tuteehub.com/tag/explanation-455162" style="font-weight:bold;" target="_blank" title="Click to know more about EXPLANATION">EXPLANATION</a>:−2x+<a href="https://interviewquestions.tuteehub.com/tag/5y-326844" style="font-weight:bold;" target="_blank" title="Click to know more about 5Y">5Y</a>−3z)<a href="https://interviewquestions.tuteehub.com/tag/2-283658" style="font-weight:bold;" target="_blank" title="Click to know more about 2">2</a> is of the <a href="https://interviewquestions.tuteehub.com/tag/form-996208" style="font-weight:bold;" target="_blank" title="Click to know more about FORM">FORM</a> (a+b+c)2(a+b+c)2=a2+b2+c2+2ab+2bc+2cawhere a=−2x,b=5y,c=−3z∴(−2x+5y−3z)2=(−2x)2+(5y)2+(−3z)2+2(−2x)(5y)+2(5y)(−3z)+2(−3z)(−2x)=4x2+25y2+9z2−20xy−30yz+12zx.</p></body></html>

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