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Expand (2- 5y + 6z)^2 |
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Answer» -STEP EXPLANATION:−2x+5Y−3z)2 is of the FORM (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. |
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